diff --git a/.resources/screenshot.png b/.resources/screenshot.png
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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,3 +1,40 @@
-# poor-mans-subfigure
+# A Poor Man's Subfigure for REVTeX
 
-A subfigure package that works with REVTeX.
\ No newline at end of file
+A subfigure package that works with REVTeX.
+
+## Installation
+
+To use, simply put the
+`.sty` file somewhere where `TeX` will find it, such as next to you
+`.tex` file.
+
+## Usage
+
+```TeX
+\begin{figure*}
+  \begin{multifig}
+    \begin{subfigure}{\columnwidth}{\label{subfig:descriptive-label}Some
+        text label.}
+      \begin{center}
+        \includegraphics[width=.8\columnwidth]{example-image-a}
+      \end{center}
+    \end{subfigure}
+    \begin{subfigure}{\columnwidth}{\label{subfig:another-descriptive-label}Another
+        text label.}
+      \begin{center}
+        \includegraphics[width=.8\columnwidth]{example-image-b}
+      \end{center}
+    \end{subfigure}
+  \end{multifig}
+  \caption{\label{fig:beautiful-figures}As the discerning eye may have
+    spied, the figures \subref{subfig:descriptive-label} and
+    \subref{subfig:another-descriptive-label} have the potential to
+    rock the foundations of society.}
+\end{figure*}
+Total nonsense, but I couldn't think of anything better to demonstrate
+Figure \ref{subfig:descriptive-label} and \ref{subfig:another-descriptive-label}.
+
+This produces the below result...
+```
+
+![The resulting figure](.resources/screenshot.png)
diff --git a/poormanssubfig.sty b/poormanssubfig.sty
new file mode 100644
index 0000000..7f5e32d
--- /dev/null
+++ b/poormanssubfig.sty
@@ -0,0 +1,42 @@
+\newcounter{subfigure}
+
+\newcommand{\subfiglabelformat}[1]{\raggedright{#1}}
+\newcommand{\subfiglabelstyle}[1]{\alph{#1}}
+\newcommand{\subfiglabelsize}{\small}
+\newenvironment{multifig}%
+{\addtocounter{figure}{1}%
+  \setcounter{subfigure}{0}%
+  \renewcommand\thesubfigure{\thefigure~(\subfiglabelstyle{subfigure})}%
+}
+{\addtocounter{figure}{-1}}
+
+\makeatletter
+\ExplSyntaxOn
+\newif\if@insubfig
+\NewDocumentEnvironment{subfigure}{mO{}}{%
+  \@insubfigtrue%
+  \refstepcounter{subfigure}%
+  \begin{minipage}{#1}%
+    \subfiglabelformat{{\subfiglabelsize (\subfiglabelstyle{subfigure})~#2}}%
+    }
+    {\end{minipage}%
+  \@insubfigfalse%
+}
+\ExplSyntaxOff
+
+\let\multifig@old@label\label%
+\def\label#1{%
+  \multifig@old@label{#1}%
+  \if@insubfig%
+    \@bsphack%
+    \protected@write\@auxout{}%
+    {\string\newlabel{#1@multifig}{{(\subfiglabelstyle{subfigure})}%
+        {\thepage}%
+        {\@currentlabelname}%
+        {\@currentHref}{}%
+      }}%
+    \@esphack%
+  \fi
+}%
+\def\subref#1{\ref{#1@multifig}}
+\makeatother