• The Mystery of the Midnight Marauder
• The Pet Show Mystery
• The Indian Burial Ground Mystery
• The Happy Valley Mystery
• The Secret of the Unseen Treasure
• The Marshland Mystery
• The Mystery off Old Telegraph Road
• The Mystery of the Missing Heiress
• The Mystery at Maypenny's
• The Mystery of the Antique Doll
• The Mystery at Mead's Mountain
• The Mystery of the Memorial Day Fire
• The Mystery at Bob-White Cave
• The Mystery of the Queen's Necklace
• The Mystery of the Castaway Children
• The Mystery of the Whispering Witch
• The Mystery of the Uninvited Ghost
• The Mysterious Visitor
• The Mystery of the Headless Horseman
• The Mystery of the Phantom Grashopper
• The Mystery on the Mississippi
• The Mystery at Saratoga
• The Black Jacket Mystery
• The Hudson River Mystery
• The Mystery of the Millionaire
• The Mystery of the Blinking Eye
• The Mystery of the Velvet Gown
• The Mystery of the Ghostly Galeon