Author: John Sievert
Alternate names: Jan Stacy; Craig Sargent; John Sievert; Ryder Stacy
Born: 4 January 1948
Died: 20 August 1989
Bio: John Sievert is a pseudonym of Jan Stacy, an American writer of military science fiction and non-fiction books, many of which were co-authored by Ryder Syvertsen.