RoarDiscover the different types of dinosaurs that once roamed the Earth in this nonfiction picture book with simple text and illustrations. Explore the world of dinosaurs with Roar by Paul Michael, a simplistic and vibrantly illustrated picture book perfect for young nonfiction readers. A long, long time ago, dinosaurs roamed the earth. Some were big, and some were little. Some were fast, and some were slow. Some lived alone, and some lived together.