From publisher blurb:
It's a Trap!!
In conjunction with d20PFSRD and Rogue Genius Games, the Four Horsemen have developed some animated ambushes perfect for surprising any party! Be sure to make a Perception check before you pick up this volume which offers the alarming wooden door trap (which slams itself on the unwitting explorer), the holding chamber of blades (which paralyzes and slashes those within), or the prismatic crushing stone trap (which surrounds, then crushes it's prey)! A total of seven animated traps in all!
Just because the players don't go down the right hallway, doesn't mean they don't set off the trap!