This book introduces several new options for the d20 system.
Chapter 1 covers various stress related disorders that might affect a character, including post traumatic stress disorder and multiple personality disorder.
Chapter 2 discusses personality in terms of modern psychology and provides a realistic, highly versatile, system for developing personalities of NPCs and PCs alike. A group dynamics matrix for developing realistic role-playing situations is also presented here.
Chapter 3 covers various types of insanity, including psychosis and dementia, which are much more realistic than the d20 core rules.
Chapter 4 introduces several new psychologically related spells.
Finally, Chapter 5 contains three new prestige classes, the mentalist, the dream weaver and the lunatic.