Was it author Dean Koontz or author Kurt Vonnegut who used pen names early in their career?
Kurt Vonnegut: Kurt Vonnegut Jr. ( ; November 11, 1922April 11, 2007) was an American writer. Dean Koontz: Dean Ray Koontz (born July 9, 1945) is an American author. Dean Koontz:  Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Leigh Nichols", and "Brian Coffey".
i don't know