Switch to letter paper, set up two columns

lbol.tex

@@ -1,4 +1,4 @@
-\documentclass[twoside, 9pt]{extreport}
+\documentclass[twoside, 9pt, letter]{extreport}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% Packages %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -18,7 +18,6 @@
 \usepackage{wrapfig}
 \usepackage{pifont}
 \usepackage[nottoc]{tocbibind} % Include bibliography in TOC without numbering
-\usepackage{multicol}
 \usepackage{wrapfig} % Let's wrap some images
 \usepackage{ulem} % Use strikethrough
 \usepackage{microtype} % Make things neater. Thanks /u/-LeopardShark-
@@ -34,6 +33,7 @@
 \usepackage{array} % Add custom widths to tables
 \usepackage{nameref} % Use chapter names in references
 \usepackage[hidelinks]{hyperref} % Include URLs, but hide the big red box in the pdf.
+\usepackage{ninecolors}
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -46,8 +46,8 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% Page Set-Up %%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \usepackage[
-	paperheight=8.5in,
-	paperwidth=5.5in,
+%	paperheight=8.5in,
+%	paperwidth=5.5in,
 	margin=0.5in,
 	heightrounded,
 ]{geometry}
@@ -87,6 +87,14 @@
 \NumTabs{18} % Define 18 tab stops (at 1/4" intervals) [tabto] package
 
 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Newspaper Columns %%%%%%%%%%%%%%%%%%%%%%
+\usepackage{multicol}
+\setlength{\columnsep}{13mm}
+\setlength{\columnseprule}{1pt}
+\def\columnseprulecolor{\color{gray5}}
+
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% Macros %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
@@ -167,6 +175,8 @@ I may do a second volume of this, or I may simply do a second edition. If I do,
 
 \chapter{Beginnings}
 
+\begin{multicols}{2}
+
 \section{About the Author}
 
 I am neither a mathematician nor a physicist, but I've been fascinated with typography for as long as I can remember.\footnote{I majored in biology and English, so poking around in old books probably had a lot to do with it.} I finally decided to take the plunge and learn \LaTeX{}, but because I have a project-based mind, I needed a project to learn it. I ended up creating a zine about Linux,\footnote{Which you can read about at \kref{https://just13.click/thecodex/}{https://just13.click/thecodex/}} typeset entirely in \LaTeX{}. It's been a fun ongoing project, and I've learned a lot as a result. I finally decided that instead of keeping notes everywhere (mostly in the preambles of the documents I've been working on) I decided to write a little book that recorded what I've learned to use as a reference guide. If I had something like this when I started, things probably would have gone much more smoothly for me. A lot of this material has been previously published in that zine, but there is quite a bit here which is new.
@@ -206,6 +216,9 @@ These are listed roughly in the order of how often I consult them.
 	\item \textbf{\textsc{TUGboat}} — The communications of the \TeX{} Users Group. Again, there is less useful information to a \LaTeX{} novice, but lots of \textit{interesting} information. \kref{https://www.tug.org/TUGboat/}{https://www.tug.org/TUGboat/}
 \end{itemize}
 
+\end{multicols}
+
+
 \chapter{\LaTeX{} Basics}
 
 \section{Files vs. Documents}