Ancient treasures are kept safe within the mighty Heroes Hold. But  the fierce Beast has  somehow slipped inside. It’s  on the hunt for 'Heroes', a book  containing  the power of all heroes from all stories.  Can the Librarian and his helpers make sure the mighty book is never checked out? Uncover hidden dangers and dark mysteries with SECRETS OF THE LIBRARY OF DOOM, a page-turning chapter book series from bestselling author Michael Dahl.