willowtreebook (22apr20)

git-svn-id: svn://tug.org/texlive/trunk@54839 c570f23f-e606-0410-a88d-b1316a301751

9 files changed, 751 insertions, 1 deletions

diff --git a/Master/texmf-dist/doc/latex/willowtreebook/README b/Master/texmf-dist/doc/latex/willowtreebook/README
new file mode 100644
index 00000000000..fa86ae90f3f
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/willowtreebook/README
@@ -0,0 +1,20 @@
+Willow Tree Book Class
+v1.0
+22 April 2020
+
+Authors: 
+Ben McKay
+
+Maintainer: 
+Ben McKay
+
+E-mail: 
+b.mckay@ucc.ie
+
+Licence: 
+Released under the LaTeX Project Public License v1.3c or later.
+See http://www.latex-project.org/lppl.txt
+
+The willowtreebook class is a simple book class, which I use for lecture notes.
+It actually just selects options for the more sophisticated memoir class.
+
diff --git a/Master/texmf-dist/doc/latex/willowtreebook/willow.jpg b/Master/texmf-dist/doc/latex/willowtreebook/willow.jpg
new file mode 100644
index 00000000000..1bbbd17e752
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/willowtreebook/willow.jpg
diff --git a/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.bib b/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.bib
new file mode 100644
index 00000000000..d7c1c37f406
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.bib
@@ -0,0 +1,11 @@
+@book {Homer:Iliad,
+    AUTHOR = {Homer},
+     TITLE = {The {I}liad},
+   EDITION = {Third},
+      NOTE = {An epic poem in dactylic hexameter, translated from the Greek by A. Guy},
+ PUBLISHER = {McHaw-Grill Book Co., New Cork},
+      YEAR = {1978},
+     PAGES = {xi+331},
+      ISBN = {0-07-000657-1},
+}
+
diff --git a/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.pdf b/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.pdf
new file mode 100644
index 00000000000..b3a61d60a64
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.pdf
diff --git a/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.tex b/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.tex
new file mode 100644
index 00000000000..f284c8d7343
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/willowtreebook/willowtreebook.tex
@@ -0,0 +1,99 @@
+\documentclass{willowtreebook}
+\Title{The Willow Tree Book Class v1.0}
+\Author{Benjamin \scotsMc{}Kay}
+\Colophon{Released under the \LaTeX{} Public Project License 1.3c}
+\BibliographyFile{willowtreebook}
+\usepackage{fancyvrb}
+\usepackage{inconsolata}
+\begin{document}
+\includegraphics[width=\textwidth]{willow-2.jpg}%
+\chapter{Preface}
+The Willow Tree Book class is a simplified derivative of the \verb!memoir! book class.
+I use it for my lecture notes.
+The document you are reading is in the Willow Tree Book class.
+\afterpreface
+\chapter{Use}
+Here is a typical book using the Willow Tree Book class:
+\begin{Verbatim}[frame=leftline]
+\documentclass{willowtreebook}
+\Title{Odyssey}
+\Author{Homer}
+\BibliographyFile{odyssey} 		
+	% The name of the .bib file, without file extension.
+\begin{document}
+\chapter{Preface}
+This is the preface to my book.
+\afterpreface
+\chapter{We meet Odysseus}
+Tell me, O muse, of that ingenious hero \dots 	
+Thus spoke Minerva, and Ulysses obeyed her gladly. Then Minerva assumed
+the form and voice of Mentor, and presently made a covenant of peace
+between the two contending parties.
+\par\bigskip\noindent
+THE END
+	% End the document without loading the bibliography
+	% or the index, or the list of notation.
+\end{document}
+\end{Verbatim}
+Compile with \verb!latex! or \verb!pdflatex!.
+\chapter{Definitions, Problems and Theorems}
+\section{Definitions}
+We can define a term like \emph{hamster}\define{hamster}, or say that the term hamster appears again later\SubIndex{hamster}.
+We add notation like when we use a variable called \(\omega\), we put it in the list of notation.\Notation{omega}{\omega}{A variable called $\omega$}
+\begin{Verbatim}[frame=leftline]
+\chapter{Definitions, Problems and Theorems}
+\section{Definitions}
+We can define a term like \emph{hamster}\define{hamster}, 
+or say that the term hamster appears again later\SubIndex{hamster}.
+\end{Verbatim}
+Compile, for a book called \verb!filename.tex!, with
+\begin{Verbatim}[frame=leftline]
+	makeindex filename
+\end{Verbatim}
+We add notation like when we use a variable called \(\omega\), 
+we put it in the list of notation.%
+\Notation{omega}{\omega}{A variable called $\omega$}.
+If you use notation, compile with
+\begin{Verbatim}[frame=leftline]
+	makeindex -s notation.gst -o not.gls not.glo  
+\end{Verbatim}
+\section{Problems}
+\begin{problem}{label.for.the.first.problem}
+What is the point of your life?
+\end{problem}
+\begin{answer}{label.for.the.first.problem}
+Your life is pointless.
+\end{answer}
+In problem~\ref{problem:label.for.the.first.problem}, we can clearly see ...
+\begin{Verbatim}[frame=leftline]
+		% We add problems by:
+\begin{problem}{label.for.the.first.problem}
+What is the point of your life?
+\end{problem}
+		% and answers by:
+\begin{answer}{label.for.the.first.problem}
+Your life is pointless.
+\end{answer}
+In problem~\ref{problem:label.for.the.first.problem}, we can clearly see ...
+\end{Verbatim}
+\chapter{Citations}
+Our bibliography file looks like
+\VerbatimInput[frame=leftline]{willowtreebook.bib}
+We can cite works from the bibliography, like Homer~\cite{Homer:Iliad}, p. 12.
+\begin{Verbatim}[frame=leftline]
+We can cite works from the bibliography, like Homer~\cite{Homer:Iliad}, p. 12.
+\end{Verbatim}
+Compile with \verb!bibtex!.
+\section{Theorems}
+You have the usual theorem environments, like \texttt{amsthm}.
+\begin{theorem}[Pythagoras]
+In any triangle with sides of lengths \(a,b,c\), \(a^2+b^2=c^2\) just when the angle opposite the side of length \(c\) is a right angle.
+\end{theorem}
+\begin{Verbatim}[frame=leftline]
+\begin{theorem}[Pythagoras]
+In any triangle with sides of lengths \(a,b,c\), 
+\(a^2+b^2=c^2\) just when the angle opposite the 
+side of length \(c\) is a right angle.
+\end{theorem}
+\end{Verbatim}
+\end{document}
diff --git a/Master/texmf-dist/tex/latex/willowtreebook/willowtreebook.cls b/Master/texmf-dist/tex/latex/willowtreebook/willowtreebook.cls
new file mode 100644
index 00000000000..61964a97fb9
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/willowtreebook/willowtreebook.cls
@@ -0,0 +1,618 @@
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesClass{willowtreebook}[2020/04/22 Willow Tree book LaTeX class v1.0]
+\DeclareOption{ContainsChinese}{\def\ChineseTextInThisDocument{}}
+\DeclareOption*{%
+\PassOptionsToClass{\CurrentOption}{article}%
+}
+\ProcessOptions\relax
+
+\LoadClass{memoir}
+
+\RequirePackage{xparse}
+
+\def\emptystring{}
+
+\edef\mckaybook@title{\emptystring}
+\edef\mckaybook@subtitle{\emptystring}
+\edef\mckaybook@author{\emptystring}
+\edef\mckaybook@bibliography{\emptystring}
+\edef\mckaybook@colophon{This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.}
+
+\NewDocumentCommand\Title{m}{\global\def\mckaybook@title{#1}}
+\NewDocumentCommand\Subtitle{m}{\global\def\mckaybook@subtitle{#1}}
+\NewDocumentCommand\Author{m}{\global\def\mckaybook@author{#1}}
+\NewDocumentCommand\BibliographyFile{m}{\global\def\mckaybook@bibliography{#1}}
+\NewDocumentCommand\Colophon{m}{\global\def\mckaybook@colophon{#1}}
+
+% For handling names like Benjamin McKay, where the letter c should be raised up, type in as Benjamin \scotsMc{}Kay.
+\makeatletter
+\DeclareRobustCommand{\scotsMc}{\scotsMcx{c}}
+\DeclareRobustCommand{\scotsMC}{\scotsMcx{\textsc{c}}}
+\DeclareRobustCommand{\scotsMcx}[1]{%
+  M%
+  \raisebox{\dimexpr\fontcharht\font`M-\height}{%
+    \check@mathfonts\fontsize{\sf@size}{0}\selectfont
+    \kern.3ex\underline{\kern-.3ex #1\kern-.3ex}\kern.3ex
+  }%
+}
+\expandafter\def\expandafter\@uclclist\expandafter{%
+  \@uclclist\scotsMc\scotsMC
+}
+\makeatother
+
+\RequirePackage{etex}
+\RequirePackage{newunicodechar}
+\RequirePackage[utf8]{inputenc} % Default input file encoding
+\ifdefined\ChineseTextInThisDocument
+\RequirePackage{CJKutf8}
+\let\I\relax
+\NewDocumentCommand\Chinese{m}{\begin{CJK*}{UTF8}{gbsn}#1\end{CJK*}}
+\else 
+\fi
+
+\RequirePackage[T1]{fontenc}
+\RequirePackage{lmodern}
+\RequirePackage{isomath}
+\RequirePackage[tt=lining]{cfr-lm}
+\RequirePackage[mathscr]{eucal}
+\RequirePackage[%
+activate={true,nocompatibility},%
+final,%
+tracking=true,%
+kerning=true,%
+spacing=true,%
+factor=1100,%
+stretch=10,%
+shrink=10]{microtype}
+\microtypecontext{spacing=nonfrench}
+\usepackage{embrac} % fixes parentheses and brackets in italic text.
+\RequirePackage{amsmath}
+\RequirePackage{amsthm}
+\RequirePackage{amssymb}
+\RequirePackage{braket}
+\RequirePackage{mathtools}
+\mathtoolsset{showonlyrefs,showmanualtags,centercolon,mathic}
+
+% If we need more room between rows of matrices and arrays, we can write
+% \begin{pmatrix}[1.5]
+% instead of 
+% \begin{pmatrix}
+\makeatletter
+\RenewDocumentCommand\env@matrix{O{\arraystretch}}
+{%
+\edef\arraystretch{#1}%
+  \hskip -\arraycolsep
+  \let\@ifnextchar\new@ifnextchar
+  \array{*\c@MaxMatrixCols c}
+}%
+\makeatother
+\NewDocumentCommand\tallmatrix{}{1.5}
+
+\RequirePackage{varioref}
+\RequirePackage{longtable}
+\RequirePackage{multicol}
+\setmarginnotes{2em}{3cm}{.5cm}
+
+% Indices
+\newcommand{\NotationIndexName}{List of notation}
+\makeindex
+\makeglossary[not]
+\changeglossnum[not]{\thepage}
+\changeglossnumformat[not]{|hyperpage}
+\renewcommand*{\glossaryname}{\NotationIndexName}
+\renewcommand*{\glossarymark}{\markboth{\glossaryname}{}}
+\renewcommand{\begintheglossaryhook}
+{%
+\begin{longtable}[c]{lp{9cm}}%
+\endfirsthead%
+\endhead%
+\endfoot%
+\endlastfoot%
+}%
+\renewcommand{\atendtheglossaryhook}
+{%
+\end{longtable}%
+}%
+\renewcommand{\glossitem}[4]{#1 & #2, #4 \\[4pt]}
+\renewcommand{\glossaryspace}{}
+\newcommand{\paddedpagenumber}%
+% Returns the current page number, zero padded, 
+% so page 3 is 003, page 12 is 012, page 101 is 101
+{%%
+\ifnum\value{page}<100 0\fi%
+\ifnum\value{page}<10 0\fi%
+\arabic{page}%
+}%%
+
+\newcounter{howmany@notation}
+\setcounter{howmany@notation}{0}
+\newcommand{\Notation}[3]%%
+%%use: \Notation{Nonmathmode token for comparing}{math mode expression}{description}
+{\glossary[not](\paddedpagenumber){\(#2\)}{#3}%
+\stepcounter{howmany@notation}%
+}
+
+\newcounter{howmany@indexentries}
+\setcounter{howmany@indexentries}{0}
+\newcommand{\SubIndex}[1]%
+{%
+\stepcounter{howmany@indexentries}%
+\index{#1}%
+}%
+% There is a serious problem with Notation. You can't
+% use absolute value signs or floor or ceiling signs anywhere. Replace them
+% with the following:
+\newcommand{\leftAbs}{\left"|}
+\newcommand{\rightAbs}{\right"|}
+\newcommand{\leftDoubleAbs}{"| "| }
+\newcommand{\rightDoubleAbs}{"| "| }
+\newcommand{\normNotation}[1]{\leftDoubleAbs#1\rightDoubleAbs}
+\newcommand{\orderForNotationIndex}[1]{\leftAbs{#1}\rightAbs}
+\newcommand{\lengthForNotationIndex}[1]{\leftDoubleAbs{#1}\rightDoubleAbs}
+\newcommand{\normForNotationIndex}[1]{\leftDoubleAbs{#1}\rightDoubleAbs}
+\newcommand{\lcl}{
+\rule[-2.5pt]{.4pt}{1em}
+\rule[6.4pt]{2pt}{.4pt}
+}
+\newcommand{\rcl}{
+\rule[6.4pt]{2pt}{.4pt}
+\rule[-2.5pt]{.4pt}{1em}
+}
+\newcommand{\lflr}{
+\rule[-2.5pt]{.4pt}{1em}
+\rule[-2.5pt]{2pt}{.4pt}
+}
+\newcommand{\rflr}{
+\rule[-2.5pt]{2pt}{.4pt}
+\rule[-2.5pt]{.4pt}{1em}
+}
+\newcommand{\ceilForNotationIndex}[1]{\lcl{#1}\rcl}
+\newcommand{\floorForNotationIndex}[1]{\lflr{#1}\rflr}
+
+% For the subject index:
+% Example:
+%    \define{interest rate}
+% puts into the Subject index a reference
+% to the current page saying that this is
+% where the term ``interest rate'' is defined.
+\newcommand{\FancyIndexEntry}[1]{\emph{\textbf{\hyperpage{#1}}}}
+\newcommand{\define}[1]
+{%
+\stepcounter{howmany@indexentries}%
+\index{#1|FancyIndexEntry}%
+}%
+%% PDF Output
+\ifpdf
+  \pdfoutput=1
+  \makeatletter
+  \RequirePackage[plainpages=false,
+    hyperfigures,
+    pdftitle={\mckaybook@title},
+    pdfauthor={\mckaybook@author},
+    colorlinks=true,
+    pdfpagelabels=true,
+    bookmarksnumbered,
+    hidelinks,
+    pagebackref,
+    pdftex]
+    {hyperref}
+  \makeatother
+  \RequirePackage{memhfixc}
+% Hyperref uses very bright colours to highlight links. Change them:
+  \RequirePackage[svgnames]{xcolor}
+  \definecolor{dark-red}{rgb}{0.4,0.15,0.15}
+  \definecolor{dark-blue}{rgb}{0.15,0.15,0.4}
+  \definecolor{medium-blue}{rgb}{0,0,0.5}
+  \hypersetup{
+    colorlinks, linkcolor={dark-red},
+    citecolor={dark-blue}, urlcolor={medium-blue}
+  }
+\fi
+
+\newcommand{\idxmark}[1]{#1\markboth{#1}{#1}}
+\newcommand{\doidxbookmark}[1]{{\def\@tempa{Symbols}\def\@tempb{#1}%
+\ifx\@tempa\@tempb %
+Analphabetics
+\phantomsection%
+\pdfbookmark[0]{Analphabetics}{Analphabetics-idx}%
+\else
+#1%
+\phantomsection%
+\pdfbookmark[0]{#1}{#1-idx}%
+\fi%
+\vskip\onelineskip\par}}
+
+\newcommand\doglobookmark[1]{%
+}%
+
+%......Figures
+\newcommand{\stdFigSize}{1in}
+\newsubfloat{figure} % Memoir class, instead of subfigure class.
+\let\subfigure\subbottom
+\newcommand{\subfigcapskip}{3em}
+\setfloatadjustment{figure}{\scriptsize\centering}
+\setfloatadjustment{marginfigure}{\scriptsize\centering}
+\setmpjustification{\scriptsize\RaggedLeft}{\scriptsize\RaggedRight}
+\captionnamefont{\scriptsize}
+\captiontitlefont{\scriptsize}
+\newcommand{\heading}{\sffamily}
+
+\newcommand{\chapterSummary}[1]{{\small{#1}}\vspace{0.5cm}\par\noindent}
+
+\makechapterstyle{bobo}{%
+\aliaspagestyle{part}{empty}
+\renewcommand{\partnamefont}{\raggedleft\normalfont\huge\heading}
+\renewcommand{\partnumfont}{\normalfont\huge\heading}
+\renewcommand{\printpartnum}{}
+\renewcommand{\partname}{}
+\renewcommand*{\parttitlefont}{\huge\heading}
+\setlength{\beforechapskip}{0pt}
+\renewcommand*{\chapnamefont}{\large\centering}
+\renewcommand*{\chapnumfont}{\large}
+\renewcommand*{\printchapternonum}{%
+\vphantom{\printchaptername}%
+\vphantom{\chapnumfont 1}%
+\afterchapternum}
+\renewcommand*{\chaptitlefont}{\Large\heading}
+\renewcommand*{\printchaptertitle}[1]{%
+\centering\smallcolouredbox\chaptitlefont ##1}}
+
+\chapterstyle{bobo}
+
+\setsecheadstyle{\large\heading\raggedright}
+\setsubsecheadstyle{\heading\raggedright}
+\setsubsubsecheadstyle{\heading\raggedright}
+\setheadfoot{2\onelineskip}{3\onelineskip}
+
+\newcommand{\optionalSection}[1]%
+{%%
+\section{#1}
+{\small{This section can be omitted without loss of continuity.}}%
+\medskip\par\noindent%
+}%%
+
+%......Table of contents
+% depth of numbering of sectioning commands:
+\setsecnumdepth{chapter}
+\maxsecnumdepth{chapter}
+%% depth of table of contents:  
+\setcounter{tocdepth}{0}
+
+\RenewDocumentCommand\cftpartfont{}{\heading\small}
+\RenewDocumentCommand\cftpartpagefont{}{\normalfont\small}
+
+\RenewDocumentCommand\cftchapterfont{}{\heading\small}
+\RenewDocumentCommand\cftchapterpagefont{}{\normalfont\small}
+
+\setlength{\cftbeforechapterskip}{3pt}
+\RenewDocumentCommand\cftchapterleader{}{\quad}
+\setpnumwidth{1em}
+\RenewDocumentCommand\cftchapterafterpnum{}{\cftparfillskip}
+
+\setlength{\cftbeforepartskip}{10pt}
+\RenewDocumentCommand\cftpartleader{}{\quad}
+\setpnumwidth{1em}
+\RenewDocumentCommand\cftpartafterpnum{}{\cftparfillskip}
+
+
+%......Title page
+\pretitle{\begin{center}\HUGE}
+\posttitle{\end{center}}
+\preauthor{\vspace{2cm}\begin{center}}
+\postauthor{\end{center}}
+\predate{\begin{center}}
+\postdate{\end{center}}
+
+\usepackage{tcolorbox}
+\tcbuselibrary{breakable}
+\tcbuselibrary{skins}
+
+%......Theorem Styles
+%\newtheoremstyle{RegularStyle}% name
+%  {}%      Space above, empty = `usual value'
+%  {}%      Space below
+%  {\normalfont}% Body font
+%  {}%         Indent amount (empty = no indent, \parindent = para indent)
+%  {\normalfont\scshape}% Thm head font
+%  {.}%        Punctuation after thm head
+%  {.5em}%     Space after thm head: " " = normal interword space;
+%        %       \newline = linebreak
+%  {} % {\thmnote{#3}}% Thm head spec
+%\theoremstyle{RegularStyle}
+%{%
+\newtheorem{theorem}{Theorem}[chapter]
+\newtheorem{lemma}[theorem]{Lemma}
+\newtheorem{corollary}[theorem]{Corollary}
+\newtheorem{proposition}[theorem]{Proposition}
+
+\colorlet{exampleBackgroundColour}{gray!16}
+
+\newtcolorbox{example}{%
+enhanced,%
+breakable,%
+colback=gray!16,%
+colframe=gray!22,%
+leftrule=1.4pt,%
+toprule=1.4pt,%
+bottomrule=1.4pt,%
+rightrule=1.4pt,%
+arc=3mm,%
+before upper={\parindent15pt\noindent}%
+}
+\newenvironment{exampleAndImage}[1]%
+{%
+\begin{tcolorbox}[enhanced,%
+breakable,%
+colback=gray!16,%
+colframe=gray!22,%
+leftrule=1.4pt,%
+toprule=1.4pt,%
+bottomrule=1.4pt,%
+rightrule=1.4pt,%
+arc=3mm,%
+sidebyside,%
+lower separated=false,%
+righthand width=#1,%
+before upper={\parindent15pt\noindent}%
+]%
+}%
+{%
+\end{tcolorbox}%
+}%
+\NewDocumentEnvironment{examples}{}{%
+\begin{example}%
+\begin{itemize}}%
+{\end{itemize}%
+\end{example}}
+
+% In the middle of an example, the background color is not white. If you need a white background to put an image on it, it looks best to use an imageborderinexample.
+\definecolor{image-border-color}{gray}{.975}
+\NewDocumentCommand\imageborderinexample{m}{\begin{center}\tcbox[colframe=image-border-color, colback=white]
+{#1}\end{center}}
+\NewDocumentCommand\includegraphicsinexample{om}%
+{\IfValueTF{#1}{\imageborderinexample{\includegraphics[#1]{#2}}}{\imageborderinexample{\includegraphics{#2}}}}
+\NewDocumentCommand\inputinexample{m}{\imageborderinexample{\input{#1}}}
+
+
+%......Problems
+% To define a new problem, use: 
+% \begin{problem}{<label>} <statement> \end{problem}
+% To give a solution to that problem:
+% \begin{answer{<label>} <statement> \end{answer}
+% using the same <label>.
+% The label is for use in \ref{problem:label}, to refer to the problem.
+% To say that a problem is exceptionally important, write
+% \begin{problem*}{<label>} <statement> \end{problem*}
+\NewDocumentEnvironment{ReviewExercises}{}{\section{Review~problems}}{}
+\NewDocumentEnvironment{subproblems}{}{\begin{enumerate}}{\end{enumerate}}
+\swapnumbers
+\newtheoremstyle{ProblemStyle}% name
+  {}%             Space above, empty = `usual value'
+  {}%             Space below
+  {\normalfont}%  Body font
+  {}%             Indent amount (empty = no indent, \parindent = para indent)
+  {\bfseries}%    Theorem head font
+  {}%             Punctuation after thm head
+  {.5em}%         Space after thm head: " " = normal interword space; \newline = linebreak
+  {}%             Theorem head specification
+\newtheoremstyle{HardProblemStyle}% name
+  {}%             Space above, empty = `usual value'
+  {}%             Space below
+  {\normalfont}%  Body font
+  {}%             Indent amount (empty = no indent, \parindent = para indent)
+  {\bfseries}%    Theorem head font
+  {\({}^*\)}%     Punctuation after thm head
+  {.5em}%         Space after thm head: " " = normal interword space; \newline = linebreak
+  {}%             Theorem head spec
+
+{%
+    \theoremstyle{ProblemStyle}
+    \newtheorem{problemTheorem}{}[chapter]
+    \theoremstyle{HardProblemStyle}
+    \newtheorem{HardProblemTheorem}[problemTheorem]{}
+}%
+\swapnumbers
+\NewDocumentEnvironment{problem}{m}{\begin{problemTheorem}\label{problem:#1}}{\end{problemTheorem}}
+\NewDocumentEnvironment{problem*}{m}{\begin{HardProblemTheorem}\label{problem:#1}}{\end{HardProblemTheorem}}
+\newoutputstream{ansout}
+\NewDocumentCommand\printanswers{}{\closeoutputstream{ansout}\input{\jobname.ans}}
+% Unfortunately, some complications involving `at' signs 
+% and protection make it apparently necessary to define a
+% \newparagraph symbol, which will later expand to \par. 
+% Otherwise, we get mysterious errors. We could probably
+% just make use of \protect here.
+\let\newparagraph=\par
+\makeatletter
+\NewDocumentEnvironment{@nswer}{m}{\@bsphack\IfStreamOpen{ansout}{}{\openoutputfile{\jobname.ans}{ansout}}
+\addtostream{ansout}{\smallskip\newparagraph\noindent\textbf{\protect\ref{problem:#1}.}}}{\@esphack}
+\newcounter{howmany@answers}
+\setcounter{howmany@answers}{0}
+\NewDocumentEnvironment{answer}{m}%
+{\stepcounter{howmany@answers}\@bsphack\@nswer{#1}\writeverbatim{ansout}}{\par\endwriteverbatim\end@nswer\@esphack}
+\makeatother
+
+% Colour for the rulings in tables:
+\RequirePackage{colortbl}
+\newcommand{\defaultArrayRuleColor}{gray!30}
+\arrayrulecolor{\defaultArrayRuleColor}
+\makeatletter
+    \def\rulecolor#1#{\CT@arc{#1}}
+    \def\CT@arc#1#2{%
+      \ifdim\baselineskip=\z@\noalign\fi
+      {\gdef\CT@arc@{\color#1{#2}}}}
+    \let\CT@arc@\relax
+\rulecolor{gray!30}
+\makeatother
+
+\RequirePackage{enumitem}
+\setlist[enumerate,1]{label=\emph{\alph*.}}
+\setlist[enumerate,2]{label=\arabic*.,
+ref=\theenumi.\emph{\alph*}}
+\setlist[enumerate,3]{label=\roman*), ref=\theenumii.\roman*}
+
+\makeatletter
+\NewDocumentCommand\writetitlepage{}
+{%
+    \ifx\mckaybook@title\emptystring
+    \else
+    		\begingroup
+    		\raggedleft
+    		\vspace*{\baselineskip}
+    		{\Large \mckaybook@author
+    		}\\[0.167\textheight]
+    		\ifx\mckaybook@subtitle\emptystring%
+			\Huge\heading\mckaybook@title\\[\baselineskip]%
+		\else%
+			\Huge\heading\mckaybook@title\\[\baselineskip]%
+	    		\Large\heading\mckaybook@subtitle\\[\baselineskip]%
+    		\fi
+		\normalfont
+    		\vfill
+    		{\Large \today}\par
+    		\vspace*{3\baselineskip}
+    		\endgroup
+    \fi
+}%
+\makeatother
+
+%% \newclr generates a colour based on the current chapter number, so we execute it every time we create a new chapter. It saves that colour in a global color variable called chpclr. This colour is used to highlight the chapter name at the beginning of the chapter and in all of the headings at the top of each page.
+\newcommand*{\newcolr}%%
+{%%
+\newcount\mycount
+% First mod out by 15:
+\mycount=\value{chapter}
+\divide\mycount by 15
+\multiply\mycount by 15
+\multiply\mycount by -1
+\advance\mycount by \value{chapter}
+% Second, choose which color scheme to interpolate:
+\ifnum\mycount>9 
+	\advance\mycount -10 
+	\multiply\mycount by 20
+	\xglobal\colorlet{chpclr}{colorAAA!\the\mycount!colorCCC}
+\else
+	\ifnum\mycount>4 
+		\advance\mycount -5 
+		\multiply\mycount by 20
+		\xglobal\colorlet{chpclr}{colorCCC!\the\mycount!colorBBB}
+	\else
+		\multiply\mycount by 20
+		\xglobal\colorlet{chpclr}{colorBBB!\the\mycount!colorAAA}
+	\fi
+\fi
+}%%
+\newlength{\smallboxh}
+\newlength{\smallboxd}
+\newlength{\smallboxw}
+\setlength{\smallboxw}{.1mm}
+\settoheight{\smallboxh}{l}
+\settodepth{\smallboxd}{l}
+\newcommand*{\blanksp}{\phantom{\rule[\smallboxd]{\smallboxw}{\smallboxh}}}
+
+\newif\ifchaptercolours
+\chaptercoloursfalse
+
+\NewDocumentCommand\smallcolouredbox{}%
+{%%
+\ifchaptercolours\,{\colorbox{chpclr}{\blanksp}}\,\else\fi
+}%%
+\RenewDocumentCommand\chapnamefont{m}{\newcolr\large\centering#1}
+
+\definecolor{colorAAA}{rgb}{.75,1,1}
+\definecolor{colorBBB}{rgb}{1,.75,1}
+\definecolor{colorCCC}{rgb}{1,1,.75}
+
+
+
+\makeatletter
+\AtBeginDocument%
+{%%
+\frontmatter
+% Title page
+\ifx\mckaybook@title\emptystring
+\else
+    \ifx\mckaybook@subtitle\emptystring%
+        \title{\MakeUppercase{\mckaybook@title}}
+	\else
+        \title{\MakeUppercase{\mckaybook@title} \\ \MakeUppercase{\mckaybook@subtitle}}
+    \fi
+    \ifx\mckaybook@author\emptystring%
+    \else
+		\author
+		{%
+			{%
+				\LARGE{\mckaybook@author}
+	        }%
+			\\
+	    }%
+	\fi
+\fi
+\makeatother
+\writetitlepage
+\thispagestyle{empty}
+\pagenumbering{roman}
+\makeheadrule{companion}{\headwidth}{0pt}
+\makeevenhead{companion}%
+{\normalfont\thepage}{}{\small\heading\leftmark\smallcolouredbox\negphantom{\smallcolouredbox}}
+\makeoddhead{companion}%
+{\small\negphantom{\smallcolouredbox}\smallcolouredbox\heading\rightmark}{}{\normalfont\thepage}
+
+\setlength{\cftchapterindent}{4cm}
+\setlength{\cftpartindent}{4cm}
+\pagestyle{empty}
+\clearpage{\footnotesize\vspace*{18cm}\par\noindent{\mckaybook@colophon}}
+\clearpage
+\pagestyle{companion}
+}%%
+
+\NewDocumentCommand\negphantom{m}{\settowidth{\dimen0}{#1}\hspace*{-\dimen0}}
+
+\NewDocumentCommand\afterpreface{}
+{%
+\clearpage
+\tableofcontents*
+\mainmatter
+\chaptercolourstrue
+\pagenumbering{arabic}
+}%
+
+\NewDocumentCommand\hintsPreamble{}{}
+\AtEndDocument%
+{%%
+
+\backmatter
+\chaptercoloursfalse
+\ifnum\value{howmany@answers}>0\relax%
+% Hints for the problems
+% Lets add a space in the table of contents.
+\chapter{Hints}\label{chp:Hints}%
+\hintsPreamble%
+\printanswers%
+\fi%
+
+\makeatletter
+\ifx\mckaybook@bibliography\emptystring
+\else
+% Bibliography
+\bibliographystyle{amsplain}
+\bibliography{\mckaybook@bibliography}
+\flushbottom
+\fi
+\makeatother
+
+% Notation Index
+\ifnum\value{howmany@notation}>0
+\indexintoc
+{\RenewDocumentCommand{\indexspace}{}{}\small{\printglossary[not]}}
+\cleardoublepage
+\fi
+
+% Index
+\ifnum\value{howmany@indexentries}>0
+\indexintoc
+\RenewDocumentCommand\indexname{}{Index}
+{\small{\printindex}}
+\fi
+
+
+}%% AtEndDocument
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index 892496eaea5..a8cc8b50705 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -783,7 +783,8 @@ my @TLP_working = qw(
     vpe vruler vtable vwcol
   wadalab wallcalendar wallpaper warning warpcol
     was wasy wasy-type1 wasysym webguide webquiz
-    widetable widows-and-orphans williams windycity withargs witharrows
+    widetable widows-and-orphans williams willowtreebook
+    windycity withargs witharrows
     wnri wnri-latex wordcount wordlike worksheet
     wrapfig wsemclassic wsuipa wtref
   xargs xassoccnt xbmks xcharter xcite xcjk2uni xcntperchap
diff --git a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
index 5408ec6e7bd..6354c581fc9 100644
--- a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
@@ -1256,6 +1256,7 @@ depend webquiz
 depend widetable
 depend widows-and-orphans
 depend williams
+depend willowtreebook
 depend withargs
 depend wordcount
 depend wordlike
diff --git a/Master/tlpkg/tlpsrc/willowtreebook.tlpsrc b/Master/tlpkg/tlpsrc/willowtreebook.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/willowtreebook.tlpsrc