Piers Anthony - Xanth
Roger Zelazny - Amber
Marion Z. Bradley - Darkover
Alan Cole, Chris Bunch - Sten
A. Bertram Chandler - Grimes
David Drake - Hammer's Slammers
Eric Flint - Ring of Fire/Grantville
Alan Dean Foster - Flinx/Commonwealth
Leo Frankowski - StarGuard
David Gerrold - Chtorr (took forever!)
Terry Goodkind - Sword of Truth
James P. Hogan - Giants
Robert Jordan - Wheel of Time
Elizabeth Moon - Paksnarrion
John Ringo - Alldenata
Fred Saberhagen - Dracula
William Mark Simmons - Halflife
E. E. Smith - Skylark, Lensman
David Weber - Honor Harrington/Dahak/March series
Those are just the ones with a bunch of books...
I remember reading his Berserker series.
-PJ