Chris Rylander is an American author of children's books. He is best known for his series The Fourth Stall, which follows the adventures of two middle schoolers as they run a business out of their school's bathroom. Rylander has also written the popular series The Codename Conspiracy and The Adventures of Sir Stinky. He has been praised for his humorous and creative writing style, and his books have been praised for their positive messages about friendship and problem-solving. Rylander is a graduate of the University of Chicago and currently lives in Chicago with his wife and two children.