This is an excellent resource for a Ravenloft or Call of Cthulhu campaign. It introduces a Stress reaction table and a list of mental disabilities with in game descriptions. These can be applied to many existing spells and monsters, like Mind Flayers.
If you use Psionics in your game, many of the spells presented in this book would probably make better psionic powers than spells. Of the three prestige classes presented, two would work for psionic PCs; the Dream Weaver and the Mentalist. On the other hand, the Lunatic is one of the few prestige classes that a NPC Commoner can take and become a threat.
Overall another great resource book from J.C. Alger
Mike Briggs (Dark Psion)
[5 of 5 Stars!]