S. Petersen's Field Guide to Creatures of the Dreamlands is a supplement published by Chaosium in 1989 for the horror role-playing game Call of Cthulhu.

The book is a bestiary of creatures that inhabit the Dreamlands, the alternate reality featured in stories of H.P.

[2] In the November 1989 edition of Games International (Issue 10), Mike Jarvis was ambivalent about this product.

He admired the colour illustrations, which he called "quite beyond belief, with creatures ranging from the delicate and profoundly beautiful to the stark alien horror more usually associated with H. P. Lovecraft's writing [...] they are truly something special."

He concluded with a strong recommendation, saying, "S. Petersen's Field Guide to Creatures of the Dreamlands is a book that anyone who likes excellent artwork should have in their collection.