Based on the bestselling game, Plants vs. Zombies: Save Your Brains introduces young readers to Crazy Dave and the fun-dead.The zombies are coming If you want to save your brains, you'll need to know which plants to use in your garden. Don't worry--Crazy Dave is here to help guide you.I Can Read books are designed to encourage a love of reading. Plants vs. Zombies: Save Your Brains is a Level Two I Can Read book, geared for kids who read on their own but still need a little help.