List of Ace SF Double Titles - Numbered Series

Numbered Series

• 22600 SF Dean R. Koontz The Fall Of The Dream Machine / Kenneth Bulmer The Star Venturers (January 1969)
• 72400 SF A. Bertram Chandler The Rim Gods / Laurence M. Janifer The High Hex (February 1969)
• 30300 SF Fritz Leiber The Green Millennium / Night Monsters (March 1969)
• 37250 SF Marion Zimmer Bradley The Brass Dragon / John T. Phillifent (as John Rackham) Ipomoea (April 1969)
• 23140 SF Dean R. Koontz Fear That Man / E. C. Tubb Toyman (May 1969)
• 77710 SF Robert Lory The Eyes Of Bolsk / Mack Reynolds The Space Barbarians (June 1969)
• 81680 SF John Jakes Tonight We Steal The Stars / Laurence M. Janifer and S. J. Treibich The Wagered World (July 1969)
• 12140 SF Brian M. Stableford Cradle of the Sea / Kenneth Bulmer The Wizards of Senchuria (August 1969)
• 42800 SF E. C. Tubb Kalin/ Alex Dain The Bane of Kanthos (September 1969)
• 23775 SF Barry N. Malzberg (as K.M. O'Donnell) Final War and Other Fantasies / John Rackham Treasure of Tau Ceti (October 1969)
• 42900 SF Lin Carter Tower Of The Medusa / George H. Smith Kar Kaballa (November 1969)
• 66160 SF Nick Kamin Earthrim / Walt Richmond and Leigh Richmond Phoenix Ship (December 1969)
• 89250 SF Marion Zimmer Bradley The Winds Of Darkover / John Rackham The Anything Tree (January 1970)
• 06707 SF Brian M. Stableford The Blind Worm / Emil Petaja Seed of the Dreamers (February 1970)
• 81610 SF Donald A. Wollheim (as David Grinnell) To Venus! To Venus! / E. C. Tubb The Jester at Scar (March 1970)
• 27235 SF Walt Richmond and Leigh Richmond Gallaghers Glacier / Positive Charge (April 1970)
• 24100 SF John T. Phillifent (as John Rackham) Flower of Doradi / Thomas Edward Renn (as Jeremy Strike) A Promising Planet (May 1970)
• 76096 SF Jeff Sutton Altons Unguessable / Kenneth Bulmer The Ships of Durostorum (June 1970)
• 52180 SF Robert Lory A Harvest Of Hoodwinks / Masters Of The Lamp (July 1970)
• 78400 SF John Jakes Mask of Chaos / Barrington Bayley The Star Virus (August 1970)
• 51375 SF Philip José Farmer The Mad Goblin / Philip José Farmer Lord of the Trees (September 1970)
• 11560 SF Suzette Haden Elgin The Communipaths / Louis Trimble The Noblest Experiment (October 1970)
• 13793 SF Dean R. Koontz Soft Come the Dragons / Dark of the Woods (November 1970)
• 27400 SF Neal Barrett, Jr. The Gates of Time / Barry N. Malzberg (as K.M. O'Donnell) Dwellers of the Deep (December 1970)
• 58880 SF Sam Lundwall Alice's World / No Time For Heroes (January 1971)
• 05595 SF Kenneth Bulmer Electric Sword Swallowers / John T. Phillifent (as John Rackham) Beyond Capella (February 1971)
• 11182 SF Ron Goulart Clockwork Pirates / Ghost Breaker (March 1971)
• 71082 SF Claudia Nunes and Rhoda Nunes Recoil / E. C. Tubb Lallia (April 1971)
• 13783 SF A. Bertram Chandler The Dark Dimensions / Alternate Orbits (May 1971)
• 13805 SF John T. Phillifent (as John Rackham) Dark Planet / Robert J. Antonick (as Nick Kamin) The Herod Men (June 1971)
• 77785 SF Eric Frank Russell Six Worlds Yonder 6 unrelated stories. / The Space Willies A spoof on Scientology. (July 1971)
• 68310 SF John Glasby Project Jove / Kenneth Bulmer The Hunters of Jundagai (August 1971)
• 27415 SF Barry N. Malzberg (as K.M. O'Donnell) Gather in the Hall of Planets / In the Pocket and Other S-F Stories (September 1971)
• 66525 SF Will F. Jenkins (as Murray Leinster) The Mutant Weapon / Pirates of Zan (October 1971)
• 75781 SF Leigh Brackett The Secret of Sinharat / Leigh Brackett People of the Talisman (November 1971)
• 77525 SF Jack Vance Son of the Tree / The Houses of Iszm (December 1971)
• 33710 SF Neal Barrett Jr. Highwood / Barrington Bayley Annihilation Factor (January 1972)
• 15890 SF A. Bertram Chandler The Rim of Space / Marion Zimmer Bradley The Door Through Space (February 1972)
• 79975 SF E. C. Tubb Technos / E. C. Tubb A Scatter of Stardus (March 1972)
• 16640 SF Jack Vance The Dragon Masters / 5 Gold Bands (April 1972)
• 00990 SF Susan K. Putney Against Arcturus / Dean R. Koontz Time Thieves (May 1972)
• 37062 SF A. Bertram Chandler The Inheritors / The Gateway to Never (June 1972)
• 10293 SF John T. Phillifent (as John Rackham) Earthstrings / Ken Bulmer The Chariots of Ra (July 1972)
• 06612 SF Mack Reynolds Blackman's Burden / Border, Breed Nor Birth (August 1972)
• 15697 SF Philip K. Dick The Unteleported Man / Dr. Futurity (September 1972)
• 31755 SF A. Bertram Chandler The Hard Way Up / Robert Lory The Veiled World (October 1972)
• 11451 SF A. Bertram Chandler Coils of Time / Into The Alternate Universe (November 1972)
• 22576 SF Marion Zimmer Bradley Falcons of Narabedla / The Dark Intruder & Other Stories (December 1972)
• 76960 SF Lester del Rey Badge of Infamy / The Sky is Falling (January 1973)
• 11650 SF Mack Reynolds Computer War / Code Duello (February 1973)
• 93900 SF Ross Rocklynne The Sun Destroyers / Edmond Hamilton A Yank at Valhalla (March 1973)
• 16641 SF Jack Vance The Dragon Masters / The Last Castle (April 1973)
• 53415 SF John T. Phillifent Hierarchies / Doris Piserchia Mister Justice (May 1973)
• 76380 SF William F. Temple Battle on Venus / William F. Temple The Three Suns of Amara (June 1973)
• 89301 SF E. C. Tubb Derai / The Winds of Gath (July 1973)
• 48245 SF John T. Phillifent Life Without Lancelot / William Barton Hunting on Kunderer (August 1973)

Serial number 48245, above, was the last Ace Double published in the tête-bêche format. The remainder of the books listed in this section contain two novels, but are published in the traditional way with a single cover and the text the same way up throughout the book. Another Ace SF double(G-723-Andre Norton-Star Hunter/Voodoo Planet)was published in 1968 as a traditional reprint in the second G series(begun in 1964). G-723 was the only traditionally printed SF double included in that series and thus does not fit under any of the categories listed here.

• 66995 SF Mack Reynolds The Rival Rigelians / Planetary Agent X (June 1974)
• 14250 SF Mack Reynolds Depression Or Bust / Dawnman Planet (September 1974)
• 20571 SF Samuel R. Delany The Ballad of Beta-2 / Empire Star (October 1975)
• 24035 SF Mack Reynolds The Five Way Secret Agent / Mercenary from Tomorrow (November 1974)

The remaining novels do not have complete date information, so they are sorted in numerical order of the serial number. Note that the following are also not in tête-bêche format.

• 01685 SF Gordon R. Dickson Alien Art / Arcturus Landing (June 1981)
• 11555 SF A. Bertram Chandler The Commodore at Sea / Spartan Planet (June 1979)
• 11556 SF A. Bertram Chandler The Commodore at Sea / Spartan Planet (September 1981; same cover as 11555-1)
• 11705 SF Robert Silverberg Conquerors From the Darkness / Master of Life and Death (July 1979)
• 24890 SF H. Beam Piper Four-Day Planet / Lone Star Planet (April 1979)
• 24892 SF H. Beam Piper Four-Day Planet / H. Beam Piper and John J. McGuire Lone Star Planet (September 1984)
• 37063 SF A. Bertram Chandler The Inheritors / The Gateway to Never (June 1978)
• 37064 SF A. Bertram Chandler The Inheritors / The Gateway to Never (September 1981)
• 37108 SF A. Bertram Chandler Into the Alternate Universe / Contraband From Otherspace (March 1979)
• 37109 SF A. Bertram Chandler Into the Alternate Universe / Contraband From Otherspace (September 1981)
• 37130 SF Robert Silverberg Invaders From Earth / To Worlds Beyond (July 1980)
• 37365 SF Robert E. Howard The Iron Man / The Adventures of Dennis Dorgan
• 49252 SF Philip José Farmer Lord of the Trees / The Mad Goblin (May 1980)
• 65874 SF Robert Sheckley The People Trap / Mindswap (August 1981)
• 66093 SF Walter Ernsting (as Clark Darlton) The Stolen Spacefleet / Klaus Mahn (as Kurt Mahr) Sgt. Robot
• 66094 SF Willi Voltz (as William Voltz) Seeds of Ruin / K. H. Scheer Planet Mechanica
• 66095 SF Walter Ernsting (as Clark Darlton) Heritage of the Lizard People / Klaus Mahn (as Kurt Mahr) Death's Demand
• 66096 SF Kurt Brand Saboteurs in A-1 / Willi Voltz (as William Voltz) The Psycho Duel
• 66097 SF K. H. Scheer Savior of the Empire / Walter Ernsting (as Clark Darlton) The Shadows Attack
• 66098 SF Winfried Scholz (as W.W. Shols) The Wasp Men Attack / Ernst Vlcek Atlan #1: Spider Desert
• 66099 SF Klaus Mahn (as Kurt Mahr) Menace of Atomigeddon / Walter Ernsting (as Clark Darlton) Atlan #2: Flight from Tarkihl
• 66121 SF Winfried Scholz (as W.W. Shols) Robot Threat: New York / Hanns Kneifel (as Hans Kneifel) Atlan #3: Pale Country Pursuit
• 66128 SF K. H. Scheer Atlan #4: The Crystal Prince / Walter Ernsting (as Clark Darlton) Atlan #5: War of the Ghosts
• 67021 SF Marion Zimmer BradleyThe Planet Savers / The Sword of Aldones (April 1980)
• 67025 SF Marion Zimmer BradleyThe Planet Savers / The Sword of Aldones (1983)
• 67026 SF Marion Zimmer BradleyThe Planet Savers / The Sword of Aldones (August 1985)
• 67027 SF Marion Zimmer BradleyThe Planet Savers / The Sword of Aldones (1987)
• 72401 SF A. Bertram Chandler The Dark Dimension / The Rim Gods (August 1978)
• 72402 SF A. Bertram Chandler The Rim of Space / The Ship From Outside (November 1979)
• 72403 SF A. Bertram Chandler The Dark Dimension / The Rim Gods (September 1981)
• 73100 SF A. Bertram Chandler The Road to the Rim / The Hard Way Up (April 1978)
• 73101 SF A. Bertram Chandler The Road to the Rim / The Hard Way Up (1979)
• 73102 SF A. Bertram Chandler The Road to the Rim / The Hard Way Up (September 1981)
• 73390 SF Avram Davidson The Kar-Chee Reign / Rogue Dragon (March 1979)
• 78537 SF Robert Sheckley The Status Civilization / Notions: Unlimited (November 1979)
• 81237 SF Gordon R. Dickson Time to Teleport / Delusion World (July 1981)
• 86495 SF L. Sprague de Camp The Virgin of Zesh / The Tower of Zanid (February 1983)