Herbert Jarrett (1874–1937) was a Chicago sales executive and advertising man.
After many years of studying metaphysical success methods, Jarrett produced the
landmark pamphlet It Works in 1926. It has since sold more than a
million copies. In 1931 Jarrett followed up his mind-power classic with his
second and final book, The Meaning of the Mark, which served as the
“inner key” to his earlier volume.