CHAPTER TITLES: 1. The Mystery of the Towers; 2. Shattered Evidence; 3. Terror By Night; 4. Deluge of Destruction; 5. Pursuit Into Peril; 6. Brink Of Doom; 7. Design For Murder; 8. The Flying Coffin; 9. S. O. S. Ranger; 10.The Death Detector; 11. The Flaming Pit; 12.Tower of Vengeance.