William Arden is the pseudonym of Dennis Lynds when writing the books in the Three Investigators series of books after the departure of Robert Arthur, the original writer of the series.
Lynds was born on 15 January 1924 in St. Louis, Missouri.
Lynds also used the alias of Michael Collins in his major writings.
Lastly Dennis Lynds passed away on 19 August 2005 in San Francisco, California.