If there's a problem in school, there's no substitute for the world-saving substitute teachers of the S.O.S.! This is the first book of this hilarious, highly illustrated early chapter book series.

When Milton Worthy learns his classroom's pet ferret is the evil mastermind behind a dastardly plot for world domination, it's more than just about any kid could handle. But then not every kid is the son of a member of the super-secret, super-awesome Society of Substitutes!

Now it's up to Milton and his substitute teacher mom to save Beacher Elementary School before time runs out.

HarperChapters build confident readers one chapter at a time! With short, fast-paced books, art on every page, and milestone markers at the end of every chapter, they're the perfect next step for fans of I Can Read!

Alan Katz has written more than forty highly acclaimed children's books, including Take Me Out of the Bathtub and Other Silly Dilly Songs, The Day the Mustache Took Over, OOPS!, Really Stupid Stories for Really Smart Kids, and the New York Times bestseller Misty the Cloud, with Dylan Dreyer. Alan has received many state awards for children's literature, and he frequently visits schools across the country.

Alan is also a six-time Emmy-nominated writer for series including The Rosie O'Donnell Show, Taz-Mania, Pinkalicious and Peterrific, numerous Nickelodeon shows, and more. He hosted a long-running game show on SiriusXM's Kids Place Live channel, and he's also created comic books, trading cards, theme park shows, and hundreds of other special projects for kids and their parents.