This is a companion discussion topic for the original entry at https://www.rstudio.com/blog/revamped-bookdown-org
Since we announced the bookdown package in 2016, there have been a large number of books, reports, notes, and tutorials written with this package and published to https://bookdown.org. We were excited to see that! At the same time, however, maintaining the list of books on bookdown.org has become more and more difficult because I must update the list manually to filter out books that are only skeletons or not built with bookdown (such as slides).