| Publisher | Green Ronin Publishing |
|---|---|
| Publication date | 2003 |
The Book of Fiends is a 2003 supplement for d20 System role-playing games published by Green Ronin Publishing.
The Book of Fiends is a supplement in which demons and devils are detailed.
The Book of Fiends won the Silver for "Best Revision, Update or Compilation" at the 2004 ENnie Awards.