From publisher blurb:
Kill Things With Your Mind!
There’s a long history of mental powers in fantasy roleplaying games—beloved by some, hated by others. In the Pathfinder Roleplaying Game rather than have psionic powers, with their own rules and a science-fiction tone, the game introduced psychic magic in Pathfinder Roleplaying Game Occult Adventures. For people who prefer psychic magic, but don’t want to miss out on the ideas originally presented as psionics, Ultimate Occult re-presents the mentalist, psion, and psychic warrior as psychic magic classes, fully compatible with the existing psychic magic rules, and with updates to the spells and options the classes need to be functional, balanced, and fun!