Kay Tracey Mysteries was a book series that ran from 1934 to 1942, covering 18 mystery titles. There were 4 different authors of this series whilst the series was tributed to the pen name of Frances K. Judd.
Titles in the Kay Tracey series were:
1.The Secret of the Red Scarf, 1934
2. The Strange Echo, 1934
3. The Mystery of the Swaying Curtains, 1935
4. The Shadow on the Door, 1935
5. The Six-Fingered Glove Mystery, 1936
6. The Green Cameo Mystery, 1936
7. The Secret at the Windmill, 1937
8. Beneath the Crimson Briar Bush, 1937
9. The Message in the Sand Dunes, 1938
10. The Murmuring Portrait, 1938
11. When the Key Turned, 1939
12. In the Sunken Garden, 1939
13. The Forbidden Tower, 1940
14. The Sacred Feather, 1940
15. The Lone Footprint, 1941
16. The Double Disguise, 1941
17. The Mansion of Secrets, 1942
18. The Mysterious Neighbors, 1942
Main Character Kay Tracey
Age: 16
Lives: Brantwood, with her mother and cousin Bill who is a lawyer.
School: Carmont (travels there by train)
Friends: Twin sisters Wilma ( renamed Wendy in the 80's reprint) and Betty Worth
Rivals: Ethel Eaton ( renamed Chris Eaton in the 80's reprint)