Leonard, Charles L.,
--The Stolen Squadron, 1942.
--Deadline for Destruction, 1942.
--The Fanatic of Fez, 1943. (aka Assignment to Death)
--The Secret Spa, 1944.
--Expert in Murder, 1945.
--Pursuit in Peru, 1946.
--Search for a Scientist, 1948.
--The Fourth Funeral, 1948.
--Sinister Shelter, 1949.
--Secrets for Sale, 1950.
--Treachery in Trieste, 1951.