From publisher blurb:
Every ghost is unique, created through a unique set of circumstances, developing powers suited to its character, background, and manner of death. The core abilities are simply a starting point, presenting a few examples of the type of powers that ghosts can develop.
This sourcebook expands the options for ghosts. Everything you need to make your ghosts unique and memorable is included within, including:
50 New ghost abilities, many of which scale in power for ghosts for different Challenge Ratings, making encounters with ghosts truly unpredictable and dangerous.
17 example backgrounds, detailing how the ghost was created and finally laid to rest.
Ghostly Powers is a Creature Powers Sourcebook for the Pathfinder Roleplaying Game, suitable for GMs and Players of any level.
This material can easily be adapted to fit into any campaign world.