Paizo Publishing has announced Pathfinder Roleplaying Game: Occult Adventures, a new 256-page hardcover book planned for July 2015 release.
The book will detail occult concepts including seances, ki, aura-reading, occult rituals, esoteric sciences, psychic combat and possession.  There will be new spells and magic items, and ways to add thematic archetypes to existing base classes, such as the haunted totem barbarian, the phrenologist bard, the ghost rider cavalier, and the psychic detective inquisitor.  The book will also include six new character classes: the kineticist, medium, mesmerist, occultist, psychic and spiritualist.  MSRP is $39.99.
The announcement came with an open call for playtesting for the book, which will run until November 25th.