Rob Bolster

In a showdown between an herbivore dinosaur and a carnivore dinosaur, who would win?

Contains facts about Tasmanian devils and wolverines, comparing such aspects as their sizes, brain structure, and abilities.

Contains facts about polar bears and grizzly bears, comparing such aspects as their sizes, brain structure, and abilities.

Contains facts about alligators and pythons, comparing such aspects as their sizes, brain structure, and abilities.

Check out how these amazing real life creatures match up. Who's the strongest, fastest, biggest and baddest? In a fight to the finish, who would win?

Contains facts about lobsters and crabs, comparing such aspects as their sizes and abilities, and what the outcome would be if they were to fight each other.

This nonfiction reader compares and contrasts two ferocious insects. Readers will learn about each animal's anatomy, behavior, and more. Then compare and contrast the battling pair before finally discovering the winner! This nonfiction series is full of facts, photos, and realistic illustrations, and it includes a range of mammals, sea creatures, insects, and dinosaurs to satisfy all kinds of animal fans.

Contains facts about killer whales and great white sharks, comparing such aspects as their sizes, brain structure, and abilities.

Readers learn about the anatomy and behavior of walruses and elephant seals and decide who would win if they fought.

Contains facts about killer whales and great white sharks, comparing such aspects as their sizes, brain structure, and abilities.