Hardy Boys Books 11-20 The Hardy Boys Mystery Collection Box Set

Hardy Boys Books 11-20 Box Set - The Hardy Boys Mystery Stories Collection (Hardcover). Add mystery to your bookshelf with this exclusive Hardy Boys Collection! This set includes books 11-20 in the series. Perfect gift to introduce new readers to the series, as well as fans looking for a beautiful collectible of these beloved classics. Recommended Ages: 9 - 12 Format: Hardcover Titles: While the Clock Ticked Footprints Under the Window The Mark on the Door The Hidden Harbor Mystery The Sinister Signpost The Figure in Hiding The Secret Warning The Twisted Claw The Disappearing Floor Mystery of the Flying Express