Leffingwell was born April 24, 1895, in
Cambridge, Massachusetts, the first son of Dr.
Albert Tracy Leffingwell, and Dr. Elizabeth Fear. He had two brothers: Thomas Arthur Leffingwell former Mayor of Aurora, New York and Dr. Dana Jackson Leffingwell, Associate Professor of Zoology at the
State College of Washington. Albert Leffingwell graduated from
Harvard University in 1916. While still at Harvard, he wrote a book of poetry,
Castles in Spain, and had two poems published in the Harvard publication,
Made to Order. Leffingwell served in
World War I in France as a member of the Intelligence Department,
108th Infantry Regiment,
27th Division, under the command of
General John F. O'Ryan. Leffingwell was married to Helen Lillian Urie; the couple had two daughters, Elisabeth and Joan Jackson. Following his return from the war, Leffingwell began his career in advertising. He co-founded the advertising agencies Riegel & Leffingwell and Olmstead, Perrin, & Leffingwell in New York City. In 1929, his firm was absorbed by
McCann. In 1928, Leffingwell wrote ''Toujours de l'avant'', about the Pineaud
perfumery in France. This book was illustrated with water colors by Will Hollingsworth. In 1930, Leffingwell wrote a short
monograph in memory of his younger brother, Dana, that was also illustrated by Hollingsworth. Between 1939 and 1946, Leffingwell wrote 13 crime and mystery thrillers under his own name, as well as under his
pseudonyms. His first novel, ''Some Day I'll Kill You
, introduced the radio ad man turned hard-boiled detective, Jim Steele, who would re-appear in a number of subsequent novels. Steele was referenced several times by the Holden Caulfield character in the novel Catcher in the Rye'' (Ch. 10, "I told them my name was Jim Steele, just for the hell of it."). Leffingwell died in 1946 in
New Haven, Connecticut. ==Bibliography==