Speaking of books written by excellent FReepers which were generated by the discussions here on Free Republic, there is this one by Alamo Girl and Betty Boop:
Don’t Let Science Get You Down, Timothy: A Light-hearted (but Deadly Serious) Dialogue on Science, Faith, and Culture Paperback – January 27, 2007
by Jean Drew (Author), Sandi Venable (Author)
https://www.amazon.com/Dont-Science-Down-Timothy-Light-hearted/dp/1430304693
Loud Mime has a book, as have prolific authors like LS and Travis McGee. In its early days, FR was a fertile field for authors.