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The Mystery of the Disappearing Dogs
Dian Curtis Regan
Paperback (Apple, May 1, 1995)A dog-napper is on the loose at the Zuffel resort, and Alix, the young owner of a pet-sitter business, is at her wits' end trying to protect her clients until she unknowingly receives help from the Ghost Twins. Original.
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The Mystery of the Haunted Castle
Dian Curtis Regan
Paperback (Apple, Dec. 1, 1995)How did the Ghost Twins end up at Canterbury Castle? Can they help Prince Card discover who is haunting his palace? Or why the ghost doesn't want the prince to become King? And what about the mysterious wise woman, the evil wizard, and the cursed forest . . . ?
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Ghost Twins: Mystery of the Disappearing Dogs
Dian Curtis Regan
Paperback (Curtis Brown Unlimited, June 6, 2018)*This is the ONLY edition authorized by the author, with updated text and new cover art* A honeymooning couple moves into the Ghost Twins’ house, along with a St. Bernard, who Thatch adores. But the dog disappears ~ along with another dog from Juniper Valley who belongs to a girl named Alix. The twins help Alix look for the missing dogs, yet she disappears as well. It’s up to the twins and Thatch to save both Alix and the dogs.
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The Haunted Campground Mystery
Dian Curtis Regan
Paperback (Scholastic Paperbacks, July 1, 1995)The ghost twins are excited when a troop of Mountain Adventure Club girls decide to have a camp-out near their vacation rental house and become unseen guests as fun, strange things start to happen. Original.
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The Mystery on Walrus Mountain
Dian Curtis Regan
Paperback (Apple, Jan. 1, 1995)Encouraging a young champion skier who won't go near the slopes after breaking his leg, the ghost twins get caught up in their guest's computer game--literally--and must retrieve their dog before it is too late
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The Missing Moose Mystery
Dian Curtis Regan
Paperback (Apple, March 1, 1995)Twin ghosts Robbie and Rebeka Zuffel and their ghostly Saint Bernard, Thatch, practice their haunting skills on a blind painter and her granddaughter and help find a missing town landmark
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The Mystery of the Haunted Castle
Dian Curtis Regan
Library Binding (Demco Media, Dec. 1, 1995)When their ghost dog Thatch becomes so interested in a library book about castles that he "smooshes" into the book, ghost twins Robbie and Beka must journey into a medieval world in order to get him back
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