Rice Burroughs Lost on Venus 49504 SF Edgar Rice Burroughs Lost on Venus 49506 SF Edgar Rice Burroughs Lost on Venus 49507 SF Edgar Rice Burroughs Lost on Venus 49548 SF Fred Saberhagen Love Conquers All 49851 SF Allen Steele Orbital Decay 50485 SF Allen Steele Lunar Descent 50531 SF Jack Vance Madouc 51356 SF Steve Perry The Machiavelli Interface (1986) 51388 SF Michael Moorcock The Mad God's Amulet 51401 SF Edgar Rice Burroughs The Mad King 51402 SF Edgar Rice Burroughs The Mad King 51403 SF Edgar Rice Burroughs The Mad King 51404 SF Edgar Rice Burroughs The Mad King 51409 SF Edgar Rice Burroughs The Mad King 51544 SF Larry Niven The Magic Goes Away (1978) 51590 SF John Eric Holmes Mahars of Pellucidar 51624 SF Philip José Farmer The Maker of Universes 51647 SF Brian Aldiss The Malacia Tapestry (1976) 51702 SF Edgar Rice Burroughs The Mad King 51910 SF Philip K. Dick The Man Who Japed (1975) 51918 SF Steve Perry The Man Who Never Missed (1986) 51943 SF David Alexander Smith Marathon 52075 SF Henry Kuttner, Bob Pepper, and Alicia Austin The Mask of Circe (1971) 52077 SF Fred Saberhagen The Mask of the Sun 52078 SF Fred Saberhagen The Mask of the Sun 52207 SF Steve Perry Matadora (1986) 52400 SF John Brunner Meeting at Infinity (February 1969) 52470 SF Donald A. Wollheim (ed.) Men on the Moon 52560 SF Alan E. Nourse The Mercy Men 52975 SF Gerard F. Conway The Midnight Dancers 53151 SF John W. Campbell The Mightiest Machine 53167 SF Algis Budrys, Charles G. Waugh, and Martin Harry Greenberg (eds.) Space Dogfights (1992) 53183 SF John Varley Millennium 53299 SF Spider Robinson Mindkiller 53355 SF Ian Watson Miracle Visitors 53503 SF Andrew J. Offutt The Mists of Doom 53540 SF George Zebrowski The Monadic Universe 53570 SF D. G. Compton The Missionaries (1972) 53587 SF Edgar Rice Burroughs The Monster Men 53588 SF Edgar Rice Burroughs The Monster Men 53591 SF Edgar Rice Burroughs The Monster Men 53701 SF Edgar Rice Burroughs The Moon Maid 53702 SF Edgar Rice Burroughs The Moon Maid 53703 SF Edgar Rice Burroughs The Moon Maid 53705 SF Edgar Rice Burroughs The Moon Maid 53719 SF Charles de Lint Moonheart (1984) 53753 SF Edgar Rice Burroughs The Moon Men 53756 SF Edgar Rice Burroughs The Moon Men 53780 SF John W. Campbell The Moon is