Campbell, Julie 's Books
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
A very well recieved series by Campbell, Julie are the books, featuring tropes. The most popular books are 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, which was published in 2022.