When spring comes, a baby calf gray whale and his mother head north to find food-all the way from Mexico to Alaska! Every gray whale makes the trip, but it"s a long way for a young calf to swim. Follow mother and baby on their four-month journey, as they jump, roll, pop up to see what"s on the water"s surface, and even confront a killer orca!A biography on the last page introduces Nancy Simmons, curator of the Department of Mammology at the American Museum of Natural History and the expert who vetted the book. FREE ACTIVITIES & PUZZLES ONLINE AT:sterlingpublishing.com/kids/sterlingeventkits