15 chapter adventure serial: 1. Caught in the Web; 2. The Open Switch; 3. The Speeding Doom; 4. The Clutch of Terror; 5. The Hand of Mystery; 6. Full Speed Ahead; 7. The Crater of Death; 8. The Plunge of Horror; 9. The Fire Trap; 10. Out of the Dungeon; 11. In the Desert's Grip; 12. Hurled to Destruction; 13. The Hidden Menace; 14. The Crash of Fate; 15. Out of the Web.