novel, Bantam 1965 Mission to Universe, sf novel, Berkley 1965 Space Winners, young-adult sf novel, Holt, Rinehart & Winston 1967 Planet Run (with Keith Laumer), sf novel, Doubleday 1967 Soldier, Ask Not, sf novel, Dell 1967 The Space Swimmers, sf novel, Berkley 1969 None But Man, sf novel, Doubleday (DAW 266) 1969 Spacepaw, sf novel, Ace 1969 Wolfling, sf novel, Analog: January, February and March; Dell (paperback) 1970s 1970 The Hour of the Horde, sf novel, Putnam 1970 Tactics of Mistake, sf novel, Analog: October, November and December 1970 / January 1971 (Doubleday, 1971) 1971 The Outposter, sf novel, Analog: May, June, and July (Lippincott 1972) 1971 Sleepwalker's World, sf novel, Lippincott 1972 The Pritcher Mass, sf novel, Analog: August, September and October (Doubleday) 1973 Alien Art, sf novel, Dutton 1973 The Far Call, sf novel, Analog: August, September and October (Dial Press 1978) 1973 The R-Master, sf novel, Lippincott (DAW 137) 1974 Gremlins, Go Home!, young-adult sf novel (with Ben Bova), St. Martin's 1975 Lifeboat (with Harry Harrison), sf novel, Analog: February, March and April 1975 Star Prince Charlie (with Poul Anderson), young-adult sf novel, Putnam 1975 Three to Dorsai!, 3 novel omnibus, Doubleday (hardcover) Dorsai!, 1959 novel Necromancer, 1962 novel Tactics of Mistake, 1970 novel 1976 The Dragon and the George, fantasy novel, SF Book Club British Fantasy Award 1976 The Lifeship, (retitle of Lifeboat), sf novel, Harper & Row 1977 Time-Storm, sf novel, St. Martin's 1978 Home From the Shore, sf novel, Ace 1978 Pro, sf novel, Ace 1979 Arcturus Landing (revision of 1956's Alien From Arcturus), Ace 1979 Masters of Everon, sf novel, SF Book Club 1980s 1984 The Final Encyclopedia, sf novel, Ace (paperback) and Tor (hardcover) 1984 Jamie the Red (with Roland Green), sword & sorcery fantasy novel, Ace (paperback) 1984 The Last Master, rewrite of 1973's The R-Master, Tor (paperback) 1985 Secrets of the Deep, omnibus of 3 young-adult sf novels, Critic's Choice (paperback) Secret Under the Sea, 1960 novel Secret Under Antarctica, 1963 novel Secret Under the Caribbean, 1964 novel 1986 The Forever Man, sf novel, Ace 1986 On the Run, retitle of 1956's Mankind on the Run, Tor (paperback) 1987 Way of the Pilgrim, sf novel, Ace (hardcover and paperback) 1988 The Chantry Guild, sf novel, Ace (hardcover and paperback) 1989 The Earth Lords, fantasy novel, Ace (paperback) (Sphere UK) 1990s 1990 The Dragon Knight, fantasy novel, Tor (hardcover) 1990 Wolf