This pseudonym list turned out be more of a project than I expected. Of the writers I’ve been reading, more than three dozen used pseudonyms -- sometimes just once, sometimes for their entire careers. Some authors, especially those with extensive paperback oeuvres, probably worried about diluting their brands. But others really wanted to hide -- and have remained hidden. The list includes only authors whose identity is unknown or who wrote under at least two names. The books in parenthesis are ones I've read. I haven't posted reviews for all of them, however.
● Arnold B. Armstrong (Parched Earth), nominal author of one of the most important California novels, has remained anonymous for 83 years.
● Loren Beauchamp (Meg) was one of dozens of pseudonyms used by Robert Silverberg.
● Norman Bligh (Remembered Moment) was a pseudonym used some 22 times by William Arthur Neubauer.
● Robert Bloomfield (Vengeance Street) was a pseudonym used for Crime Club books by Leslie Edgley.
● Florenz Branch (She Had What They Wanted and a half-dozen other novels I've read) was a pseudonym used many times by Florence Stonebraker.
● Paul Cain (Fast One) was an early pseudonym of the screenwriter usually known as Peter Ruric.
● Owen Dudley (The Deep End) was a name occasionally employed by the author who usually used the pseudonym Dean McCoy.
● John Evans (at least the one credited with writing If You Have Tears) was a pseudonym of crime writer Howard Browne.
● John Farr (The Lady and the Snake) was a pseudonym sometimes used by mystery writer Jack Webb.
● Gerald Foster (’Frisco Sweetheart) and Roy Booth (Sin Suits Me) were both pseudonyms employed by James Noble Gifford.
● Mary Cavendish Gore (Mad Hatter’s Village) was a pseudonym of a very accomplished writer who might have been Liam O’Flaherty.
● Richard Hallas (You Play the Black and the Red Comes Up) was a pseudonym used by Eric Knight.
● Whit Harrison (Sailor’s Weekend) was one of the pseudonyms used by prolific novelist Harry Whittington.
● Richard Hayward (Trapped) was a pseudonym of Baynard H. Kendrick.
● Geoffrey Homes (The Doctor Died at Dusk) was a pseudonym of successful screenwriter Daniel Mainwaring.
● Steve January (Rusty Diamond) was a pseudonym used only once by an author still unknown.
● Martin Kramer (Sons of the Fathers) was a pseudonym used by Beatrice Ann Wright before she became well known as a psychologist.
● Rae Loomis (Marina Street Girls and two other books) was a pseudonym used by Shelby Steger for her California novels.
● Haynes Lubou (Reckless Hollywood) was the pseudonym chosen by the writer who published as
Dorothy Lubov (when she was single) and Dorothy Hart (after she married).
● Ross Macdonald (The Three Roads and ten other books I’ve read) was the pseudonym employed by famed mystery writer Kenneth Millar after he stopped using his real name.
● Conrad Maine (Good-Time Girl) was the pseudonym concocted by C. G. Lumbard and Ken Kolb for the only book they wrote together.
● Jason Manor (The Tramplers and The Red Jaguar) was the pseudonym used by Oakley Hall for his crime stories.
● Reed Marr (Catch a Falling Star) was the easy-to-figure-out pseudonym of P. J. Reed-Marr.
● Kay Martin (On Easy Terms and The Whispered Sex) was one of at least three pseudonyms used by Adela Maritano.
● Richard McKaye (Portrait of the Damned) was the pseudonym employed by Richard K. Brunner, who later wrote religious and ethical commentary.
● Wade Miller (Kitten with a Whip and Guilty Bystander) was a pseudonym used by Robert Wade and Bill Miller, a San Diego writing team that produced 33 novels between 1946 and 1961. Wade then wrote under his own name and as Whit Masterson.
● Kate Nickerson (Passion Is a Woman) was a pseudonym of Lulla Adler [Rosenfeld].
● Philip Race (Self-Made Widow) was a pseudonym used for a few books by E. M. Parsons.
● Douglas Ring (The Peddler) was an early pseudonym employed by best-selling paperback writer Richard S. Prather.
● Marta Roberts (Tumbleweeds) was a pseudonym of an author who used the name only once and remains anonymous today.
● Roney Scott (Shakedown) was a pseudonym of William Campbell Gault.
● Thomas Stone (Tramp Girl and eleven other novels I’ve read) was a pseudonym used many times by Florence Stonebraker.
● Florence Stuart (Police Lady) was yet another pseudonym of Florence Stonebraker, this one used for her romances.
● John Trinian (North Beach Girl) was a pseudonym used by Zekial Marko.
● James Updyke (It’s Always Four O’Clock) was a pseudonym of well known crime writer W. R. Burnett.
● J. X. Williams (Carnival of Lust) was a popular pseudonym apparently first used for this book by John Jakes.