Direct Descent 15238 SF George Warren Dominant Species 15670 SF Philip K. Dick Dr. Bloodmoney, Or How We Got Along After the Bomb (1976) 15697 SF Philip K. Dick Dr. Futurity / The Unteleported Man (September 1972) 15890 SF Marion Zimmer Bradley The Door Through Space / A. Bertram Chandler The Rim of Space (February 1972) 16600 SF Fred Saberhagen The Dracula Tape (1972) 16640 SF Jack Vance The Dragon Masters / 5 Gold Bands (April 1972) 16641 SF Jack Vance The Dragon Masters / The Last Castle (April 1973) 16647 SF Andre Norton Dragon Magic 16648 SF Jack Vance The Dragon Masters 16651 SF Jack Vance The Dragon-Masters 16668 SF John Brunner The Dramaturges of Yan 16669 SF Andre Norton Dread Companion (1970) 16670 SF Andre Norton Dread Companion (1970) 16701 SF Roger Zelazny The Dream Master 16728 SF Larry Niven and Steven Barnes Dream Park (1983) 17000 WE Dan J. Stevens The Dry Fork Incident / Reese Sullivan The Deadly Deputy (1969) 17235 WE Clay Ringold Duel in Lagrima Valley / Don P. Jenison South To New Range (1970) 17239 SF Ben Bova The Dueling Machine 17625 SF Frank Herbert Dune 17810 NA Jan Hoffman A Dying in the Night (1975) 18630 SF Gordon Eklund The Eclipse of Dawn (1970) 18770 SF Edgar Rice Burroughs Master of Adventure (1968) 19640 NA Eliot Asinof Eight Men Out (1963) 19681 SF Samuel R. Delany The Einstein Intersection 19710 SF Bob Shaw A Wreath of Stars 20275 SF Alan Garner Elidor 20556 SF H. Beam Piper Empire 20563 SF Fred Saberhagen Empire of the East 20565 SF Barrington J. Bayley Empire of Two Worlds 20571 SF Samuel R. Delany Empire Star / The Ballad of Beta-2 (November 1973) 20656 SF Keith Laumer End As a Hero (1985) 20660 SF Marion Zimmer Bradley Endless Universe (1975) 20661 SF Marion Zimmer Bradley Endless Universe (1979) 20664 SF Jerry Pournelle Endless Frontier, Volume I 20670 SF Judith Merril (ed.) England Swings SF: Stories of Speculative Fiction 20724 SF Poul Anderson Ensign Flandry (1979) 20730 SF Keith Laumer Envoy To New Worlds 21430 SF Mack Reynolds Equality in the Year 2000 21562 SF Edgar Rice Burroughs Escape on Venus 21567 SF Edgar Rice Burroughs Escape on Venus 21590 SF James White The Escape Orbit (1983) 21599 SF Christopher Stasheff Escape Velocity 21803 SF Edgar Rice Burroughs The Eternal Savage 21804 SF Edgar Rice Burroughs The