Wesley Remory has been doing some amazing work putting together a hand illustrated tome. His latest pages feature the Deep Ones. Because of the amount of work required creating a tome from scratch is probably the pinnacle of Lovecraftian propmaking. Sculpting a Cthulhu idol comes a close second, but dozens of artists have done that. Complete tomes? There are vanishingly few of them, and the majority were done by professionals for film work.