The Mystery of Sinister Scarecrow
M. V. Carey
The Mystery of the Blazing Cliffs
The Mystery of the Death Trap Mine
The Mystery of the Flaming Footprints
The Mystery of the Invisible Dog
The Mystery of the Magic Circle
The Mystery of the Monster Mountain
The Mystery of the Scar-faced Beggar
The Mystery of the Singing Serpent
The Mystery of Wandering Caveman
The Secret of the Haunted Mirror