The Reefs of Space, by Frederik Pohl and Jack Williamson
The Game of Empire, by Poul Anderson
The Ring of Ritornel, by Charles L Harness
That Way Lies Camelot, by Janny Wurts
This is the Way the World Begins, by J T McIntosh
The Mask of the Sun, by Fred Saberhagen
Wildeblood's Empire, by Brian M Stableford
Tides of Light, by Gregory Benford
The Chieftain, by John Norman
The World Menders, by Lloyd Biggle Jr
The Wrong End of Time, by John Brunner
Visible Light, by C J Cherryh
The Time Bender, by Keith Laumer
The Big Black Mark, by A Bertram Chandler
The Darkness on Diamondia, by A E van Vogt
The Hammer of God, by Arthur C Clarke
The Patchwork Girl, by Larry Niven
Vigilant, by James Alan Gardner
Tom O'Bedlam, by Robert Silverberg
World Out of Mind, by J T McIntosh
The Loafers of Refuge, by Joseph Green
The Third Eagle, by R A MacAvoy
The Face of the Waters, by Robert Silverberg
The Inheritors & Gateway to Never, by A Bertram Chandler