1998, Bill Munster, Discovering Dean Koontz, Wildside Press LLC, →ISBN, page 64:
Within a week of King's acknowledging the Bachman pen name, several sources —publishers, book dealers, readers, and fans—had mentioned a number of possible other pseudonyms; obviously, if King admitted to two pen names, John Swithen and Richard Bachmann, there might be others.
2002, Jacqueline Ching, Abigail Adams: A Revolutionary Woman, The Rosen Publishing Group, →ISBN, page 19:
In their time, it was fashionable to sign letters using a pen name. These pen names were borrowed from characters in classical literature.
