I can't agree with the below rating of 3 stars. (Read Below) This is on-par with any other bestiary piazo has produced. Although i cant speak of quality due to just buying a pdf, this bestiary has the best range of monster selection in my opinion. It adds some technology driven ideas, unique story driven monsters and my favorite: A BoneShip, literally the pcs can fight an undead ship!!!! The complaint of no new monster over CR25 is a lazy lie, using templates the Esoteric Dragons can be over CR25 with other CR20+ monsters utilizing templates provided can increase above CR25. This book contains ideas for familiars, companions, and constructs for many classes and pairs amazingly well with content from the Occult Adventures. I Love this book, and pathfinder in general due to the wealth of information it has for both a PC and a DM. Cant wait for more!!!