In the 1930s, he founded the committee to free Nobel laureate Carl von
Ossietzky from a Nazi concentration camp.
He spoke eight languages.
http://www.fredsakademiet.dk/library/carl/kurt.htm
(his life as he tells it - very impressive)
Partial book list:
(With Franz J. Polgar) Polgar: Story of a Hypnotist, Thomas Nelson,
1948, reprinted as The Story of a Hypnotist: Polgar, Hermitage House,
1951.
The World's 30 Greatest Women Spies, Funk, 1951 (published in England
as The World's Greatest Women Spies, W. H. Allen, 1951), French
translation as Les Plus grandes espionnes du monde, Gallimard, 1952.
(Translator) Esther Gretor, Kippie the Cow (juvenile), Messner, 1951.
Gentlemen Spies, W. H. Allen, 1952.
Spies and Traitors: A Short History of Espionage, W. H. Allen, 1953.
The Men in the Trojan Horse, Beacon Press, 1953.
(Editor) The World's Best Spy Stories: Fact and Fiction, Funk, 1954
(published in England as The World's Greatest Spy Stories: Fact and
Fiction, W. H. Allen, 1954).
The Laughton Story: An Intimate Story of Charles Laughton, Winston,
1954 (published in England as The Charles Laughton Story, R. Hale,
1954).
More Spy Stories, W. H. Allen, 1955.
Spy Stories from Asia, Funk, 1955 (published in England as Spies over
Asia, W. H. Allen, 1956).
(Editor) My Greatest Crime Story, by Police Chiefs of the World, Hill &
Wang, 1956.
The Danny Kaye Saga, R. Hale, 1957, published as The Danny Kaye Story,
Thomas Nelson, 1958.
(Editor) My Strangest Case, by Police Chiefs of the World, W. H. Allen,
1957, Doubleday, 1958.
Spy Omnibus, W. H. Allen, 1959, Denison, 1960.
(Editor and author of introduction) Spies Who Changed History, Ace
Books, 1960.
(Editor) Eight Tales Complete from the World's Greatest Spy Stories,
Belmont Books, 1961.
Crime Omnibus, W. H. Allen, 1961.
Hemingway: Life and Death of a Giant, Holloway House, 1961.
(Editor) The Secret Agent's Badge of Courage, Belmont Books, 1961.
The Unearthly: The World's Greatest Stories of the Occult, Panther
House, 1962.
Horror Omnibus, W. H. Allen, 1965.
(Compiler) Kurt Singer's Ghost Omnibus, W. H. Allen, 1965.
(Editor with others) The Fine Art of Spying, Grosset, 1965.
(Editor) I Can't Sleep at Night: 13 Weird Tales, Whiting & Wheaton,
1966.
(Editor) Weird Tales of the Supernatural, W. H. Allen, 1966.
Mata Hari, Award Books, 1967.
(Editor) Tales of Terror, W. H. Allen, 1967.
(Editor) The Gothic Reader, Ace Books, 1968.
Tales of the Uncanny, W. H. Allen, 1968.
(Editor) Famous Short Stories, two volumes, Denison, 1968.
(Editor) Tales of the Macabre, New English Library, 1969.
(Editor) Bloch and Bradbury, Belmont Books, 1969.
Tales from the South Pacific (juvenile), Denison, 1969.
(Editor) The House in the Valley, and Other Tales of Terror, Sphere
Books, 1970.
Plague of the Living Dead, Sphere Books, 1970.
(Editor) Tales from the Unknown, W. H. Allen, 1970, published as Tales
of the Unknown, Pinnacle Books, 1971.
Ghouls and Ghosts, W. H. Allen, 1972.
Satanic Omnibus, W. H. Allen, 1973.
Kurt Singer's Gothic Horror Book, W. H. Allen, 1974.
They Are Possessed: Masterpieces of Exorcism, W. H. Allen, 1976.
Dictionary of Home Repair, Ottenheimer, 1977.
Strange Stories of the Unknown, Scholastic Books, 1980.
I Spied and Survived, Leisure Books, 1980.
All published anonymously or by News Background
Confidential Report on 1036 Pro-Nazi Firms Who Believed You Could Do
Business with Hitler, 1942, 1943.
Spies and Saboteurs in Argentina, edited by "Don Modesto" (pseud.),
1942.
The Riddle of Sweden's Ballbearings, 1944.
With wife, Jane Sherrod; juvenile books:
Spies for Democracy, Denison, 1960.
Great Adventures of the Sea, Denison, 1962.
(Editors) Great Adventures in Crime, Denison, 1962.
Dr. Albert Schweitzer: Medical Missionary: A Biographical Sketch of a
Man Who Has Dedicated His Life to Others (juvenile), Denison, 1962.
Ernest Hemingway: Man of Courage: A Biographical Sketch of a Nobel
Prize Winner in Literature (juvenile), Denison, 1963.
(Editors) Ghost Book: The World's Greatest Stories of the Known
Unknown, W. H. Allen, 1963.
Lyndon Baines Johnson: Man of Reason (juvenile), Denison, 1964, revised
edition published as Lyndon Baines Johnson, Man of Reason: The L.B.J.
Story from Kennedy to Vietnam, 1966.
Folk Tales of Mexico, T. S. Denison, 1969.
Lenona.
Jim