15 books in series

Chaosium's Call of Cthulhu books

Chaosium's Call of Cthulhu books is a 15-book series first released in 1976 with contributions by Robert Bloch, Robert E. Howard, and 50 others.

Mysteries of the Worm
Mysteries of the Worm

1981 • 3 Readers • 288 pages

The Book of Iod
The Book of Iod

1995 • 204 pages

The Hastur Cycle

1993 • 2 Readers • 304 pages 5