H-20 KENNETH BULMER The Key to Irunium (cover by Gray Morrow; 1967; listed as "First Book Publication") and H-20b ALAN SCHWARTZ The Wandering Tellurian (cover by Jerome Podwil; 1967; listed as "Complete Novel")
H-21 JACK VANCE (aka JOHN HOLBROOK VANCE) The Last Castle (cover by Jack Gaughan; 1967; listed as "First Book Publication") and H-21b TONY RUSSELL WAYMAN World of the Sleeper (cover by Jack Gaughan; 1967; listed as "Complete Novel")
H-22 TOM PURDOM Five Against Arlane (cover by Jack Gaughan; 1967; listed as "First Book Publication") and H-22b EMIL PETAJA Lord of the Green Planet (cover by Kelly Freas; 1967; listed as "Complete Novel")
H-27 JUANITA COULSON Crisis on Cheiron (cover by Jerome Podwil; 1967; listed as "Complete Novel") and H-27b E. C. TUBB The Winds of Gath (cover by Kelly Freas; 1967; listed as "First Book Publication")
H-29 WALT and LEIGH RICHMOND The Lost Millennium (cover by Jack Gaughan; 1967; listed as "First Book Publication") and H-29b A. BERTRAM CHANDLER The Road to the Rim (cover by Jerome Podwil; unaccredited; 1967; listed as "Complete Novel")
H-34 MACK REYNOLDS (aka DALLAS McCORD REYNOLDS) Computer War (cover by Hoot von Zitzewitz; unaccredited; 1967; listed as "First Book Publication") and H-34b E. C. TUBB Death is a Dream (cover by Rob Howard; 1967; listed as "Complete Novel")
H-36 EMIL PETAJA Tramontane (cover by Jack Gaughan; 1967; listed as "First Book Publication") and H-36b MICHAEL MOORCOCK The Wrecks of Time (cover by Jack Gaughan; 1967; listed as "Complete Novel")
H-40 E. C. TUBB C.O.D. Mars (cover and frontspiece illustration by Jack Gaughan; 1968) and H-40b JOHN RACKHAM (aka JOHN T. PHILLIFENT) Alien Sea (cover by George Ziel and interior illustration by Jack Gaughan; 1968)
H-48 ELLEN WOBIG The Youth Monopoly (cover by Jack Gaughan; 1968; listed as "Complete Novel") and H-48b LAN WRIGHT (aka LIONEL PERCY WRIGHT) The Pictures of Pavanne (cover by Jack Gaughan; 1968)
H-51 EMIL PETAJA The Prism (cover by Jack Gaughan; 1968; listed as "First Book Publication") and H-51b JOHN M. FAUCETTE Crown of Infinity (cover by Kelly Freas; 1968; listed as "Complete Novel")
H-56 ERNEST HILL Pity About Earth (cover and interior sketch by Kelly Freas; 1968; listed as "Complete Novel") and H-56b R. A. LAFFERTY Space Chantey (cover and interior chapter heading sketches by Vaughan Bode; 1968; listed as "First Book Publication")
H-59 LOUIS TRIMBLE Anthropol (cover and frontspiece by Jack Gaughan; 1968; listed as "First Book Publication") and H-59b PHILIP E. HIGH The Time Mercenaries (cover by Gray Morrow; frontspiece by Jack Gaughan; 1968; listed as "Complete & Unabridged")
PHILIP EMPSON HIGH was an English science fiction author. Born in Biggleswade, Bedfordshire on 28 April 1914 his writing career spanned over 50 years before his death in Canterbury, Kent on 9 August, 2006.
H-65 MACK REYNOLDS (aka DALLAS McCORD REYNOLDS) Mercenary From Tomorrow (cover by Jack Gaughan; 1968; listed as "Complete Novel") and H-65b KENNETH BULMER The Key to Venudine (cover by Kelly Freas; 1968; listed as "First Book Publication")
H-70 EMIL PETAJA Doom of the Green Planet (cover by Jerome Podwil; 1968; listed as "First Book Publication") and H-70b DEAN R. KOONTZ Star Quest (cover by Gray Morrow; 1968; listed as "Complete Novel")
H-77 E. C. TUBB Derai (cover and interior sketch by Jeff Jones; 1968) and H-77b JUANITA COULSON The Singing Stones (cover by Kelly Freas; 1968; listed as "First Book Publication")
H-85 PHILIP E. HIGH Invader on My Back (cover and frontspiece illustration by Jack Gaughan; 1968; listed as "First Book Publication") and H-85b DAVID GRINNELL (aka DONALD A. WOLLHEIM & LIN CARTER) Destination: Saturn (cover by Kelly Freas and interior illustration by Jack Gaughan; c. 1967; 1968; listed as "Complete & Unabridged")
H-91 JOHN RACKHAM (aka JOHN T. PHILLIFENT) The Proxima Project (cover by John Schoenherr; frontspiece by Jack Gaughan; 1968; listed as "First Book Publication") and H-91b LAURENCE M. JANIFER (aka Larry M. Harris) and S. J. TREIBICH Target: Terra (cover and fronstspiece by Jack Gaughan; 1968; listed as "Complete Novel")
H-95 CLIFFORD D. SIMAK So Bright the Vision (cover by Gray Morrow; 1968) and H-95b JEFF SUTTON The Man Who Saw Tomorrow (cover by Jack Gaughan; 1968)
H103 MACK REYNOLDS (aka DALLAS McCORD REYNOLDS) Code Duello (cover by Kelly Freas; 1968) and H-103b JOHN M. FAUCETTE The Age of Ruin (cover by Gray Morrow; 1968)