Investigator’s Guide Investigator’s Guide is a core setting book for the WWII action horror Acthung! Cthulhu, for Call of Cthulhu and Savage Worlds, written by Chris Birch, Dave Blewer, Alex Bund, Adam Crossingham, Lynne Hardy, Sarah Newton, and Matthew Pook and published by Modiphius Entertainment. By Aaron T. Huss Learn more about Investigator’s Guide here Purchase Investigator’s...