The Ultimate Rugrats Fan Book is a non-fiction book about Rugrats, published in 1998, shortly before the release of The Rugrats Movie. It contains full details of the series, including four chapters devoted to the following topics:
The history of how the show was made, and its rise to popularity
Profiles of each of the characters, with short bios of their voice actors
A behind-the-scenes look at how the episodes are made
An episode guide with short summaries for all of the episodes up to "The Family Tree", listed in production order
A 1999 reprint by Grolier Enterprises expanded the episode guide chapter to include all the episodes up to "Runaway Reptar". However, no revisions have been made to the book since then.