For the 1920s Investigator's Companion CoC
Vol 2
Pariah
Dan Abnett
Warhammer 40k:Inquisitor (5)
A Witch Alone: Thirteen moons to master natural magic
Marian Green
The Complete Book Of Eldritch Might
Malhavoc Press
Lords of Madness: The Book of Aberrations
Richard Baker
Fiend Folio
Eric Cagle