Bullfrog Books

In From Metal to Bicycle, early fluent readers learn how a bicycle is made, from producing steel from metal to workers welding the frame. Vibrant, full-color photos and carefully leveled text More →

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In Tigers, beginning readers will learn about tigers and their cubs. Vibrant, full-color photos and carefully leveled text will engage young readers as they are introduced to tigers'… More →

In Lions, beginning readers will learn about lions and their cubs. Vibrant, full-color photos and carefully leveled text will engage young readers as they are introduced to lions' appearance, More →

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In Cheetahs, beginning readers will learn about cheetahs and their cubs. Vibrant, full-color photos and carefully leveled text will engage young readers as they are introduced to cheetahs'… More →

How fast can a cheetah run? Why do tigers have stripes? Find the answers to these questions and more in Big Cats! A diagram supplements the content, while a picture glossary reinforces new… More →

How fast can a cheetah run? Why do tigers have stripes? Find the answers to these questions and more in Big Cats! A diagram supplements the content, while a picture glossary reinforces new… More →

In Leopards, beginning readers will learn about leopards and their cubs. Vibrant, full-color photos and carefully leveled text will engage young readers as they are introduced to leopards'… More →

In Jaguars, beginning readers will learn about jaguars and their cubs. Vibrant, full-color photos and carefully leveled text will engage young readers as they are introduced to jaguars'… More →

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In Cougars, beginning readers will learn about mountain lions and their cubs. Vibrant, full-color photos and carefully leveled text will engage young readers as they are introduced to… More →