Max and Petra travel through time via the Chronal Engine. In the Cretacious Period, the two encounter dinosaurs and overcome many obstacles in a fast-paced, engaging adventure. Dinosaur fans, especially, will enjoy this exciting story. Other readers may find the many dinosaur names challenging and a bit off-putting, or find that keeping characters’ relationships straight challenging. Packed with interesting information, and part of a time-travel series, this volume stands well on its own. Many readers will demand previous volumes to read when they complete this one.