The celebrated author and illustrator brings to life the joys of reading, writing, and sharing in this tale of a boy's discovery of the library mouse. Sam the library mouse loves to write, and the children love his little books, which he leaves on the library shelves for them to find. But no one at the library has ever met him. When Tom can't find a partner for a book-making assignment and finds Sam's secret hole behind the children's reference section, will the pair be able to work together, or will Sam's secret identity be spoiled forever? A heartwarming tale about collaboration and creative ambitions, this book will enchant any young aspiring author or illustrator.