In this "funny and heartwarming" (Booklist) historical fiction companion to The Rhino in Right Field, Nick's summer gets way more exciting when a polar bear escapes from the local zoo--perfect for fans of Stuart Gibbs and The One and Only Ivan. It's 1948, and twelve-year-old Nick is ready for the best summer ever. He's going to hang out with his best pal, Ace, and maybe with Penny too--she is a girl, but she...