* Worlds Between (1985)
* Peregrine (1986)
* Frie Radikale (1988)
* Gods at Daybreak (1989)
* The First Alien Trilogy (1991)
* Storm over tomrummet
* Beyond the Event Horizon
* I konstant fare
* The World Engine (1994)
* First Strike (1996)
* Firefight (1997)
* Stjernefald (2000)
* Darkstar Rising (2001)
Fiktion
* Sort lys (2007)
* The Trouble With Demons (2008)
* Trouble Rides a Pale Horse (2009)
* The Devil You Know (2011)
* Where Demons Fear to Tread (2012)
Faglitteratur
* Handbook of Space Science (1988)