Petersen's Abominations: Call of Cthulhu 7th Edition - Rules of Play says:
A collection of five nightmarish modern-day scenarios for the Call of Cthulhu Roleplaying Game. Gathered from across the aeons, this anthology of horror brings together for the first time a series of scenarios from the mind of Sandy Petersen, the creator of the Call of Cthulhu Roleplaying Game. Each one-shot scenario is designed for one or more sessions of play.