From publisher blurb:
Be All You Must Not Be!
Come experience indescribable horrors, unceasing madness, and more tentacles than you can count! Grow in size, develop weird powers, manifest potent psychic abilities, and even drive mundane creatures insane as you level your way to becoming an unnameable doom. Create the aberration you want to play in the Pathfinder Roleplaying Game, as your favorite iconic monsters or your own new, unique entity.
This product includes:
Six races of aberrant threats to represent any aberration, including the Warptouched humanoid race
Alternate racial traits and favored class options
The Aberrant Champion universal archetype (compatible with 48 classes)
New class archetypes: the Conduit of the Forbidden (Psychic), Freak Wrangler (Hunter), and Opener of the Ways (Summoner)
That Which Must Not Be racial paragon class 1st-20th level
Class- and race-specific feats to round out any aberration character