For the 1920s Investigator's Companion CoC
Vol 2
Mandaean Book of Black Magick
E. S. Drower
Tomb Of Horrors (DM Rewards Version)
Gary Gygax • Scott Fitzgerald Gray
Call of Cthulhu - Pulp Cthulhu - A Cold Fire Within
Keeper Reference Booklet
Liber MMM
Peter Carroll