Novels Winning Both Awards


Forever Peace
THE FOREVER WAR
Joe Haldeman
Red Mars (Nebula 1993), Green Mars (Hugo 1994), and Blue Mars (Hugo 1997)
Kim Stanley Robinson
Doomsday Book
Connie Willis
NEUROMANCER
William Gibson
ENDER'S GAME
SPEAKER FOR THE DEAD
Orson Scott Card
STARTIDE RISING
David Brin
THE FOUNTAINS OF PARADISE
Arthur C Clarke		 DREAMSNAKE
Vonda N McIntyre		 GATEWAY
Frederik Pohl
RENDEZVOUS WITH RAMA
Arthur C Clarke		 THE DISPOSSESSED
THE LEFT HAND OF DARKNESS
Ursula K Le Guin		 THE GODS THEMSELVES
Isaac Asimov
RINGWORLD
Larry Niven		 DUNE
Frank Herbert
 

Here's a link to another page of reviews of the "combined winners" by Nicholas Whyte, including novels and novellas.