- Author: Ryder Syvertsen Author Record # 1450
- Legal Name: Syvertsen, Reidar Otto
- Birthplace: USA
- Birthdate: 19 April 1941
- Deathdate: 24 February 2015
- Language: English
- Webpages: SFE
- Used These Alternate Names: John Sievert, Ryder Stacy
- Author Tags: horror (2), psychic ability (1)
| Other views: | Awards Alphabetical Chronological |
Fiction Series
- C.A.D.S.
- 1 C.A.D.S. (1985) with Jan Stacy [only as by John Sievert]
- 2 Tech Battleground (1986) [only as by John Sievert]
- 3 Tech Commando (1986) [only as by John Sievert]
- 4 Tech Strike Force (1987) [only as by John Sievert]
- 5 Tech Satan (1988) [only as by John Sievert]
- 6 Tech Inferno (1988) [only as by John Sievert]
- 7 Doom Commander (1989) [only as by John Sievert]
- 8 Cybertech Killing Zone (1989) [only as by John Sievert]
- Doomsday Warrior
- 1 Doomsday Warrior (1984) with Jan Stacy [only as by Ryder Stacy]
- 2 Red America (1984) with Jan Stacy [only as by Ryder Stacy]
- 3 The Last American (1984) with Jan Stacy [only as by Ryder Stacy]
- 4 Bloody America (1985) with Jan Stacy [only as by Ryder Stacy]
- 5 America's Last Declaration (1985) [only as by Ryder Stacy]
- 6 American Rebellion (1985) [only as by Ryder Stacy]
- 7 American Defiance (1986) [only as by Ryder Stacy]
- 8 American Glory (1986) [only as by Ryder Stacy]
- 9 America's Zero Hour (1986) [only as by Ryder Stacy]
- 10 American Nightmare (1987) [only as by Ryder Stacy]
- 11 American Eden (1987) [only as by Ryder Stacy]
- 12
Death, American Style (1987)
only appeared as:
- Variant: Death American Style (1987) [as by Ryder Stacy]
- 13 American Paradise (1988) [only as by Ryder Stacy]
- 14 American Death Orbit (1988) [only as by Ryder Stacy]
- 15 American Ultimatum (1989) [only as by Ryder Stacy]
- 16 American Overthrow (1989) [only as by Ryder Stacy]
- 17 America's Sword (1990) [only as by Ryder Stacy]
- 18 American Dream Machine (1990) [only as by Ryder Stacy]
- 19 America's Final Defense (1991) [only as by Ryder Stacy]
- Mystic Rebel
- 1 Mystic Rebel (1988)
- 2 The Dancing Dead (1988)
- 3 Darkness Descends (1988)
- 4 Temple of Dark Destiny (1989)
- 5 Cave of the Master (1990)
- 6 Fortress of Forbidden Destiny (1991)
- Psychic Spawn (1987) with Rosemary Ellen Guiley [only as by Adrian Fletcher and Ryder Syvertsen]
- The Great Book of Movie Monsters (1983) with Jan Stacy