S. Petersen's Field Guide to Cthulhu Monsters
A Field Observer's Handbook of Preternatural Entities
A Field Observer's Handbook of Preternatural Entities
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1 primary book2 released booksCall of Cthulhu RPG is a 33-book series with 1 primary work first released in 1981 with contributions by Sam Johnson, Dave Blewer, and 54 others.
