Publications (3) 
| Title | Code | Date | Publisher | System (Setting) |
|---|---|---|---|---|
 S. Petersen's Field Guide to Cthulhu Monsters | CHA5105 | 1988 | Chaosium | Call of Cthulhu (Classic) |
| S. Petersen's Field Guide to Creatures of the Dreamlands | CHA5107 | 1989 | Chaosium | Call of Cthulhu (Dreamlands) |
| S. Petersen's Field Guide to Lovcraftian Horrors | CHA23138 | 2015 | Chaosium | Call of Cthulhu (Classic) |