When Wolf finds a fact-filled book in the library, he thinks he will at last outsmart his clever cousin Dog.

The two cousins swap fascinating facts about mummies and skeletons; robots, knights, and pirates; dinosaurs and dragons; rockets and the moon.

But Wolf is wild and Dog is tame--these two always find there's just as much to learn about friends and enemies, setting traps, playing tricks and chewing bones.

What Dog Knows is a fresh and funny mix of fiction and facts for inquisitive readers. It is packed with information, activities, quizzes, rhymes and stories.