 The 1st edition of the "GURPS Bestiary" was written by Steffan O'Sullivan, with a cover by Ken Kelly and illustrations by Dan Carroll, and was first published by Steve Jackson Games in 1988 as a 112-page book.The 2nd edition of "GURPS Bestiary" was updated by Chris McCubbin and Bob Schroeck, and had rules for were-creatures that wound up in "GURPS Shapeshifters" (2003).McCubbin and Schroeck wrote an article in a 1993 issue of "Pyramid" (a magazine published by Steve Jackson Games), offering extra material for the book.