Kate Simkins is an author, co-author, and editor of children's books, many of them part of the DK Readers Graphic Readers series, which features colorful, information-filled works for readers of all ages. Her book subjects range from sports, to wagon trains, to Barbie. Some of her works include I Want to Be a Gymnast, Let's Play Tennis, The Spy-Catcher Gang, and The Curse of the Crocodile God.
John Kelly is a published author and an illustrator of action/adventure books for young readers. Some of his works include The Robot Zoo: A Mechanical Guide to the Way Animals Work; The Mystery of Eatum Hall; Scoop!: An Exclusive by Monty Molenski; The Unprecedented Discovery of the Dragon Islands; Wagon Train Adventure; and The Spy-Catcher Gang and Wagon Train Adventure from the DK Graphic Readers Series.