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.