As far as I can tell, mystery and suspense writer Dana Lyon published fifteen novels during her thirty-year career. She set most, probably nearly all, in California. So I was puzzled when only five showed up in An Annotated Bibliography of California Fiction, 1664-1970 by Newton D. Baird and Robert Greenwood. Using WorldCat and the catalog of the Los Angeles Public Library, I was able to come up with the longer list. It turned out that the missing novels came from publishers that either were small and obscure, specialized in books mostly for rental libraries, or printed paperback originals. I'm still surprised that a well known author such as Lyon would use these publishers so often -- and that a standard bibliographical source would skip them so frequently. Here’s the list, with an asterisk marking the missing titles.
The Bathtub Murder. Williams Publishing Co., 1933 (with Josephine Hughston)
*Retaliation: Love's Kickback. Authors Publications, 1934
*Heartbreak. Godwin, 1935
*Follow Men. Godwin, 1936
*Let Me Go. Hillman Curl, 1937
*Rapture Yet to Come. Gramercy, 1939
No Shelter for the Heart. M. S. Mill, 1940
*A Good Family. Gramercy, 1942
*It's My Own Funeral. Farrar & Rinehart. 1944
*I'll Be Glad When You're Dead. Royce, 1945
The Frightened Child. Harper, 1948
aka House on Telegraph Hill. Mercury Publications, 1948
The Tentacles. Harper, 1950
The Lost One. Harper, 1958
*Spin the Web Tight. Ace, 1963
*The Trusting Victim. Ace, 1964