Expelled from Simon Grantz High School, Yulsman lied about his age in March 1941 in order to enlist in the U.S. Army Air Corps.
This combat action brought him the Distinguished Flying Cross, which is awarded for "heroism or extraordinary achievement while participating in an aerial flight."
After the war, Yulsman moved to Manhattan where he became a successful freelance photojournalist, shooting "jazz, politics and girls" and hanging out in Greenwich Village at the Limelight Cafe, while contributing to Playboy, Collier's, Look and other magazines.
During this period he teamed up with author Cornelius Ryan (The Longest Day) on a story about the world's fastest submarine.
During the 1970s, Yulsman worked for the Ringling Brothers Barnum & Bailey Circus for four years and taught photography at the School of Visual Arts.
In the book's opening pages, Adolf Hitler is sitting in a café in Vienna in 1913 when he is assassinated by a British woman, Elleander Morning.
Under pseudonyms, he wrote adult fiction, including the first three volumes of The Intimate Memoir of Dame Jenny Everleigh, which was later serialized.