From publisher blurb:
There is an almost indescribable feeling when taking on forms other than your own, be it a feeling of freedom from societies shackles or an understanding of the trials and tribulations others live with. Becoming something other than what you were born to be is an intoxicating drug, with those that partake sometimes losing themselves to the feelings engendered by inhabiting another form.
Giving you the ability to become the quitessential shapeshifter, this new class allows you to pick and choose which types of creature you can change into as well as what sorts of abilities you possess.
This class contains 54 feats that are a mixture of modifying your shapeshifting ability and those that simply give you new actions to take in combat.