Lion, Monkey, Emu, Panda, and Polar Bear live in the zoo. When Lion receives a postcard from Africa, he is suddenly homesick. Luckily, Monkey has really long arms and can reach the zoo keys to unlock the cages. The five friends escape and return to their native lands. With this vividly illustrated novelty picture book, young readers learn about habitats and geography through the postcards the animal friends write and send each other. Four real postcards, found at the end of the book, encourage children to write to their own friends and relatives.