This book is one of a brilliant few that tries to explore the prehistoric world as more than just dinosaurs (and the similar Mesozoic animals). Instead, there is a great overview of every major group, with many animals being discussed that most people would not be aware of. It's great to see the opportunity for someon's horizons to be broadened, even if the information is mostly introductory. It's also great to see a book that doesn't end with the usual discussion of human evolution as if that is an apex) but instead discusses it among primate evolution, early in the mammal section.
The only reservation about this book is the title, which might be misleading (but at least it would be a good surprise, not a disappointment).