Chapter Titles:
- 1. The Stolen Plans (PCA #7048)
- 2. The Fatal Time-Bomb (PCA #7061)
- 3. The Secret Meeting (PCA #7067)
- 4. The Smoke Dream (PCA #7075)
- 5. The Gargoyle's Trail (PCA #7084)
- 6. The X-Ray Eye (PCA #7094)
- 7. The Radio Boomerang (PCA #7102)
- 8. The Mysterious Message (PCA #7111)
- 9. The Cup of Doom (PCA #7119)
- 10. The X-Ray Belt (PCA #7129)
- 11. Lips Sealed by Murder (PCA #7137)
- 12. A Money Bomb (PCA #7142)
- 13. Almost a Confession (PCA #7146)
- 14. Suspicious Telegram (PCA #7166)
- 15. The Payoff (PCA #7172)
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