From the back cover:
A bestiary of epic proportions! Inside you will find hundreds of animals, monsters and races. Many are culled from myth, others are staples of fantasy fiction, and many more are completely original - unlike anything you have ever seen in a role playing game before! Creatures & Monsters includes monsters that fly, swim, and terrozie the land. You also find many pages devoted to animals of all types, ranging from those that characters can protect and defend to those that can threaten their very lives.