This book explains in detail the life of seven different dinosaurs. It tells how big they are how to say their name properly, what their fossils look like and why they maybe became extinct. At the end of the book it has some of the mysteries of dinosaurs. It says that no one truly knows why they became extinct. This was a great fact book that is not very hard for kids to understand. This is a book that is a good research book to use for kids over dinsosaurs!! ( )