Franklyn M. Branley was the originator of the Let's-Read-and-Find-Out Science series and the author of close to 150 popular books about scientific topics for young readers of all ages. He was Astronomer Emeritus and former Chairman of the American Museum of Natural History-Hayden Planetarium. Mary Ann Fraser has illustrated over 50 books and written and illustrated seven books, among them In Search of the Grand Canyon, Ten Mile Day, and Forest Fire, including her Where Are the Night Animals? in the Let's Read & Find Out series, an Outstanding Science Trade Book for Children. Interested in nature since she was very young, she keeps ten turtles, a newt and a crayfish as pets. Ms. Fraser lives in Simi Valley, CA.