Leon Shimkin (April 7, 1907 – May 25, 1988) was an American businessman who helped to build Simon & Schuster into a major publishing company.
Shimkin was responsible for many self-help bestsellers turning Dale Carnegie's lectures into the bestselling book How to Win Friends and Influence People and J.K.
Lasser's tax books.
Shimkin co-founded Pocket Books and was a pioneer by distributing mass market paperbacks through newsstands and drugstores.
Shimkin became the third partner to Simon & Schuster's Max Schuster and Richard L.
Simon and remained as an executive after Simon & Schuster was sold to Field Enterprises, Inc.
in 1944.
Shimkin rose to become chairman of the board and owner of Simon & Schuster until he sold it to Gulf + Western in 1975.