2022 - The Missing Mitt [The Hardy Boys: Secret Files Bk 2] (Paperback) ISBN-13: 9781665930819 ISBN-10: 1665930810 Genre: Children's Books ? 2022 - Mystery Map [The Hardy Boys: Secret Files Bk 3] (Paperback) ISBN-13: 9781665930826 ISBN-10: 1665930829 Genre: Children's Books ? 2016 - The House on the Cliff 2 [The Hardy Boys] (Hardcover) ISBN-13: 9780448489537 ISBN-10: 0448489538 Genre: Children's Books ? 2010 - Mystery Map [Hardy Boys Secret Files, Bk 3] (Paperback) ISBN-13: 9780545283946 ISBN-10: 0545283949 Genre: Children's Books ? 2010 - Mystery Map [Hardy Boys: Secret Files] (Paperback) ISBN-13: 9781416991656 ISBN-10: 1416991654 Genre: Children's Books ? 2010 - The Missing Mitt [Hardy Boys: Secret Files] (Paperback) ISBN-13: 9781416993940 ISBN-10: 1416993940 Genre: Children's Books ? 2008 - Double Trouble [Double Danger, Bk 1 - Hardy Boys: Undercover Brothers, Bk 25] (Paperback) ISBN-13: 9781416967651 ISBN-10: 1416967656 Genre: Children's Books 1 2007 - Murder at the Mall [Hardy Boys: Undercover Brothers, Bk 17] (Paperback) ISBN-13: 9781416939306 ISBN-10: 141693930X Genre: Children's Books 1 2005 - Thrill Ride [Hardy Boys: Undercover Brothers, Bk 4] (Paperback) ISBN-13: 9781416900054 ISBN-10: 1416900055 Genre: Children's Books 3 2004 - Warehouse Rumble [Hardy Boys, No 183] (Paperback) ISBN-13: 9780689864551 ISBN-10: 0689864558 Genre: Children's Books 5 2002 - The Sting of the Scorpion [Hardy Boys, No 58] (Hardcover) ISBN-13: 9780448089584 ISBN-10: 0448089580 Genre: Children's Books 4 1998 - The Tower Treasure [Hardy Boys, Bk 1] (Hardcover) ISBN-13: 9780448089010 ISBN-10: 0448089017 Genre: Children's Books 78 1997 - The Missing Chums [Hardy Boys, Bk 4] (Hardcover) → Hardcover ISBN-13: 9780448089041 ISBN-10: 0448089041 Genre: Children's Books 40 1995 - The Shore Road Mystery [Hardy Boys, No 6] (Hardcover) ISBN-13: 9780448089065 ISBN-10: 0448089068 Genre: Children's Books 38 1995 - What Happened at Midnight [Hardy Boys, Bk 10] (Hardcover) ISBN-13: 9780448089102 ISBN-10: 0448089106 Genre: Children's Books 20 1994 - The Mystery of Cabin Island [Hardy Boys #8] (Hardcover) → Paperback ISBN-13: 9780448089089 ISBN-10: 0448089084 Genre: Children's Books 18 1992 - The Mystery of the Aztec Warrior [Hardy Boys, No 43] (Hardcover) ISBN-13: 9780448089430 ISBN-10: 0448089432 Genre: Children's Books 9 1992 - Secret of the Caves [Hardy Boys, Bk 7] (Hardcover) ISBN-13: 9780448089072 ISBN-10: 0448089076 Genre: Children's Books 19 1991 - Trouble in Pipeline [Hardy Boys Casefiles, No 26] (Paperback) ISBN-13: 9780671746612 ISBN-10: 0671746618 Genre: Children's Books 2 1991 - The Borgia Dagger [Hardy Boys Casefiles, No 13] (Paperback) → Paperback ISBN-13: 9780671736767 ISBN-10: 0671736760 Genre: Children's Books ? 1990 - Smoke Screen Mystery [Hardy Boys, No 105] (Paperback) → Hardcover ISBN-13: 9780671692742 ISBN-10: 0671692747 Genre: Children's Books ? 1963 - Hunting for Hidden Gold [Hardy Boys, No 5] (Hardcover) → Paperback, Hardcover, Audio Cassette |