All books in excellent condition. We have the core rules for the Cthulhu setting, Malleus Monsnstrorum is an a-z of creatures, monsters and Great Old Ones. The Necronomiconis a fiction book, great fun, and full of ideas and source material. The world atlas of mysteries full of great locations to set scenarios. 1919-1938 These Tremendous Years this is an almanac and full of great resources and events to base campaigns around, this book is really old.