If you are new to R Markdown, we recommend you start with R Markdown: The Definitive Guide to get an overview. Part I introduces how to install the relevant packages, and provides an overview of R Markdown, including the possible output formats, the Markdown syntax, the R code chunk syntax, and how to use other languages in R Markdown.
Next, the chapter on Books
will help orient you to how the bookdown package allows
you to use R Markdown to author books, using single or multiple
.Rmd files to build your content.
Written by Yihui Xie, the package author, bookdown: Authoring Books and Technical Documents with R Markdown introduces the R package and how to use it. The book is published by Chapman & Hall/CRC, and you can read it online for free.
The book is structured into several chapters to guide the reader into the use of the R package bookdown to write books:
https://bookdown.org is the place to find examples of books created with bookdown.
See more about how to publish a book or get your book listed on the About bookdown.org.
Look also at the “Examples” page.