 Blue Bay Mystery by Gertrude Chandler Warner |  The Deserted Library Mystery by Gertrude Chandler Warner |  Benny Uncovers a Mystery by Gertrude Chandler Warner |  The Haunted Cabin Mystery by Gertrude Chandler Warner |  The Woodshed Mystery by Gertrude Chandler Warner |  The Castle Mystery by Gertrude Chandler Warner |  Tree House Mystery by Gertrude Chandler Warner |  Mike's Mystery by Gertrude Chandler Warner |  The Lighthouse Mystery by Gertrude Chandler Warner |  The Mystery at Skeleton Point by Gertrude Chandler Warner |  Caboose Mystery by Gertrude Chandler Warner |  Schoolhouse Mystery by Gertrude Chandler Warner |  The Disappearing Friend Mystery by Gertrude Chandler Warner |  Mystery Behind the Wall by Gertrude Chandler Warner |  The Pizza Mystery by Gertrude Chandler Warner |  The Animal Shelter Mystery by Gertrude Chandler Warner |  Mountain Top Mystery by Gertrude Chandler Warner |  Houseboat Mystery by Gertrude Chandler Warner |  The Mystery of the Hidden Painting by Gertrude Chandler Warner |  The Mystery of the Lost Village by Gertrude Chandler Warner |