He was the manager of the New York branch of John Lane, the London publisher, from 1896 to 1900, business manager of the Smart Set in 1900โ01, founded in 1901 and was editor and proprietor until 1905 of the Reader magazine.
He married Helen Rockwell Morley. In 1906, he started in the book publishing business. He used typesetter Frederic W. Goudy for his books, and advanced him money to complete one of his first successful fonts, which Goudy named Kennerley Old Style as a dedication.[1]
In 1910, he undertook the publication of The Forum and of The Papyrus (the later for author Michael Monahan). He was a dealer in and published the work of Oscar Wilde and Walt Whitman. In 1913, he was arrested, for sending an "obscene" book through the mail.
In 1912, Kennerley's The Lyric Year One Hundred Poems, gave writer George Sterling 2nd place for his An Ode for the Centenary of the Birth of Robert Browning. This recognition was shared with Bertha Newberry's The Beloved, as they represented California in this anthology.[2][3]
Shatzkin, Leonard, "Zero Royalty", book review of The Fortunes of Mitchell Kennerley, Bookman, by Matthew J. Bruccoli; The New York Times, December 7, 1986
Gross, John, book review of The Fortunes of Mitchell Kennerley, Bookman, by Matthew J. Bruccoli; The New York Times, October 21, 1986