This book explores the prehistoric world of the Rocky Mountains, focusing on the Allosaurus and other dinosaurs that inhabited the region millions of years ago. The Dinosaur Find-This series, authored by the esteemed Dougal Dixon, delves into the diverse environments where dinosaurs lived. These beautifully illustrated volumes showcase some of the most formidable creatures to have ever existed, highlighting their size, speed, and intelligence.

The book is part of Dougal Dixon's Dinosaur Find-This series, which is known for its accessible approach to paleontology for younger readers. The series generally receives positive attention for its detailed illustrations and clear explanations of dinosaur life and habitats. Readers often appreciate the focus on specific regions and the variety of dinosaurs presented, making complex scientific information engaging and understandable for children.