1. By the Light of the Study Lamp  2. The Secret at Lone Tree Cottage  3. In the Shadow of the Tower  4. A Three-Cornered Mystery  5. The Secret at the Hermitage  6. The Circle of Footprints  7. The Mystery of the Locked Room  8. The Clue in the Cobweb  9. The Secret at the Gatehouse 10. The Mysterious Fireplace 11. The Clue of the Rusty Key 12. The Portrait in the Sand 13. The Secret in the Old Well 14. The Clue in the Ivy 15. The Secret of the Jade Ring

16. The Mystery at the Crossroads 17. The Ghost in the Gallery 18. The Clue of the Black Flower 19. The Winking Ruby Mystery 20. The Secret of the Swiss Chalet 21. The Haunted Lagoon 22. The Mystery of the Bamboo Bird 23. The Sierra Gold Mystery 24. The Secret of Lost Lake 25. The Mystery of the Stone Tiger 26. The Riddle of the Frozen Fountain 27. The Secret of the Silver Dolphin 28. The Mystery of the Wax Queen 29. The Secret of the Minstrel's Guitar 30. The Phantom Surfer