From publisher blurb:
So Your PCs Think They're Bulette-Proof?!
Well, it's time to hit them with higher caliber threats! Unique, dangerous, and memorable, these twelve new sub-species of bulettes put a new spin on one of the game’s apex predators. From brutish Dum Dums to undead Hollow-Points, as you rifle through this volume you are presented with full details on each member of this bulette train. The variant bulettes are fully illustrated, each with detailed stat blocks, unusual new abilities, and a history of how such strange twists to a legendary monstrosity came to pass. Armed with this book, you can unleash the ultimate bulette ballet! AND! As a bonus, two new feats specifically designed to allow PCs to handle these beasts. Consider this a new arsenal to use against your players in lieu of the standard ammunition.
It's Bulette Time!