52 Hardbound Titles of the Greatest teenage detective pairs, the Hardy Boys.
Titles include:
Hardy Boys 1: Mystery Of The Desert Gian
Hardy Boys 2: Hunting For Hidden Gold
Hardy Boys 3: The Shore Road Mystery
Hardy Boys 4: The Secret Of The Caves
Hardy Boys 5: The Mystery Of Cabin Island
Hardy Boys 6: The Great Airport Mystery
Hardy Boys 7: What Happened At Midnight
Hardy Boys 8: While The Clock Ticked
Hardy Boys 9: Footprints Under The Wind
Hardy Boys 10: The Mark On The Door
Hardy Boys 11: The Hidden Harbor Mystery
Hardy Boys 12: The Sinister Signpost
Hardy Boys 13: A Figure In Hiding
Hardy Boys 14: The Secret Warning
Hardy Boys 15: The Twisted Claw
Hardy Boys 16: The Disappearing Floor
Hardy Boys 17: The House On The Cliff
Hardy Boys 18: The Clue Of The Broken Blade
Hardy Boys 19: The Flickering Torch Mystery
Hardy Boys 20: The Melted Coins
Hardy Boys 21: The Short-Wave Mystery
Hardy Boys 22: The Secret Panel
Hardy Boys 23: The Phantom Freighter
Hardy Boys 24: The Secret Of Skull Mount
Hardy Boys 25: The Sign Of The Crooked Arrow
Hardy Boys 26: The Secret Of The Lost Tunnel
Hardy Boys 27: The Wailing Siren Mystery
Hardy Boys 28: The Secret Of Wildcat Swamp
Hardy Boys 29: The Crisscross Shadow
Hardy Boys 30: The Yellow Feather Mystery
Hardy Boys 31: The Hooded Hawk Mystery
Hardy Boys 32: The Clue In The Embers
Hardy Boys 33: The Secret Of Pirates' Hill
Hardy Boys 34: The Ghost At Skeleton Rock
Hardy Boys 35: Mystery At Devil'S Paw
Hardy Boys 36: The Mystery Of The Chines
Hardy Boys 37: The Missing Chums
Hardy Boys 38: The Clue Of The Screeching Owl
Hardy Boys 39: The Viking Symbol Mystery
Hardy Boys 40: The Mystery Of The Aztec
Hardy Boys 41: The Haunted Fort
Hardy Boys 42: The Mystery Of The Spiral
Hardy Boys 43: Mystery Of The Whale Tattoo
Hardy Boys 44: The Arctic Patrol Mystery
Hardy Boys 45: Danger On Vampire Trail
Hardy Boys 46: The Masked Monkey
Hardy Boys 47: The Shattered Helmet
Hardy Boys 48: The Clue Of The Hissing Serpent
Hardy Boys 49: The Mysterious Caravan
Hardy Boys 50: The Witchmaster'S Key
Hardy Boys 51: The Jungle Pyramid
Hardy Boys 52: The Sting Of The Scorpion