This concise non-fiction title serves as an excellent introductory resource for young dinosaur enthusiasts. It focuses specifically on the dinosaurs of western North America, highlighting the Allosaurus, which offers a more focused approach than general dinosaur books. The factual presentation is straightforward, making it suitable for both read-alouds with younger children (4-6) and independent reading for early elementary students (7-11). While the data is sparse, the book's purpose is clearly educational, aiming to explain concepts and build vocabulary related to paleontology. Parents seeking a book to satisfy a child's specific interest in regional dinosaurs or to supplement a science lesson will find this a useful, quick read.