The Mystery of the Ravenspurs
The Mystery of the Pinckney Draught
The Mystery of the Lost Dauphin (Louis XVII)
The Mystery of the Locks
The Mystery of the Iron Box
The Mystery of the Hidden Room
The Mystery of the Hasty Arrow
The Mystery of the Green Ray
The Mystery of the Four Fingers
The Mystery of the Fires
The Mystery of the Fifteen Sounds
The Mystery of the Downs
The Mystery of the Deserted Village
The Mystery of the Clasped Hands: A Novel
The Mystery of the Boule Cabinet: A Detective Story
The Mystery of The Barranca