This is a really amazing book. Creatures are innovative and creative. The arts are mesmerizing.
There are monsters with fantasy, sci-fi and horror backstory, but I can imagine these creatures in other adventure genres with ease.
In addition to the monsters there are many tips on how to create my own monsters, tables for creating random creatures and tips for creating adventures and campaigns.
This is one of the most complete books I have ever purchased on DriveThruRPG. I will use it for years in my Fate games.