The Ninja Librarians (Hardcover) → Paperback ISBN-13: 9781402287701 ISBN-10: 1402287704 Genres: Children's Books, Politics & Social Sciences 1 The Ninja Librarians Sword in the Stacks (Paperback) → Hardcover ISBN-13: 9781492647935 ISBN-10: 1492647934 Genre: Children's Books ? The Ninja Librarians the Accidental Keyhand (Paperback) → Hardcover ISBN-13: 9781492601807 ISBN-10: 1492601802 Genre: Children's Books ? Sword in the Stacks [Ninja Librarians, Bk 2] (Hardcover) → Paperback ISBN-13: 9781402287732 ISBN-10: 1402287739 Genre: Children's Books ? |