1. The Secret of the Old Clock - Russell H. Tandy - 1930

2. The Hidden Staircase - Russell H. Tandy - 1930

3. The Bungalow Mystery - Russell H. Tandy - 1930

The Mystery at Lilac Inn - Russell H. Tandy - 1930

5. The Secret at Shadow Ranch - Russell H. Tandy - 1931

6. The Secret of Red Gate Farm - Russell H. Tandy - 1931

7. The Clue in the Diary - Russell H. Tandy - 1932

8. Nancy's Mysterious Letter - Russell H. Tandy - 1932

9. The Sign of the Twisted Candles - Russell H. Tandy - 1933

10. The Password to Larkspur Lane - Russell H. Tandy - 1933

11. The Clue of the Broken Locket - Russell H. Tandy - 1934

12. The Message in the Hollow Oak - Russell H. Tandy - 1935

13. The Mystery of the Ivory Charm - Russell H. Tandy - 1936

14. The Whispering Statue - Russell H. Tandy - 1937

15. The Haunted Bridge - Russell H. Tandy - 1937

16. The Clue of the Tapping Heels - Russell H. Tandy - 1939

17. The Mystery of the Brass Bound Trunk - Russell H. Tandy - 1940

27. The Secret of the Wooden Lady - Bill Gillies - 1950

30. The Clue of the Velvet Mask - Polly Bolian - 1959

56. The Thirteenth Pearl - Rudy Nappi - 1979

Cover Formats (under construction)