ence Chapters/Subchapters]]

.pull-left[
`index.Rmd`

```r
# Prerequisites {-#pre} 

This is a _sample_ book written in **Markdown**. 
```
&lt;hr&gt;
`01-intro.Rmd`

```r
# Introduction {#intro}

*Next we review the [literature](#lit)...
```
&lt;hr&gt;
`02-literature.Rmd`

```r
# Literature {#lit}

*Following Chapter \@ref(intro),...
```

]

.pull-right[
### Prerequisites

This is a _sample_ book written in **Markdown**. 
&lt;hr&gt;
### Chapter 1  Introduction

Next we review the [literature](https://skelet