H-001 THEODORE KUPFERMAN (ed.) The Family Legal Adviser (1957)
H-002 GEORGE RYLEY SCOTT Curious Customs of Sex and Marriage (1960; 1st ACE printing; ACE Star edition; listed as "complete and unabridged"; non-fiction)
H-003 LOUIS PAUL Dara The Cypriot (1962; 1st thus; ACE Star edition; historical fiction)
H-004 OLIVE ECKERSON My Lord Essex (1966; 1st thus; ACE Star edition; historical fiction)
H-005 JOHN H. CULP Born For The Sun (1966; 1st thus; ACE Star edition; historical fiction)
H-006 FORENCE A. SEWARD Gold For The Caesars (1966; 1st thus; ACE Star edition; historical fiction)
H-007 JOHN H. CULP The Restless Land (1966; 1st thus; ACE Star edition; historical fiction)
H-008 WILL CREED (aka WILLIAM LONG) The Sword of Il Grande (1966; 1st thus; ACE Star edition; historical fiction)
H-009 THEODORA DuBOIS Captive of Rome (cover by Lou Marchetti; 1966; 1st thus; ACE Star edition; historical fiction)
H-010 THEODOR PLIEVIER Berlin (1966)
H-011 THEODOR PLIEVIER Moscow (1966)
H-012 HAROLD WILKINS Strange Mysteries of Time and Space (1966)
H-013 GARDNER SOULE The Mystery Monsters (1966; 1st ACE printing)
H-014 VINCENT GADDIS Invisible Horizons (1966; 1st thus; occult/paranormal)
H-016 HANS HOLZER Ghosts I've Met (cover by Cosimo Scianna; 1966; 1st thus; occult/paranormal)
H-017 JACQUES VALLEE Anatomy Of A Phenomenon (1966; might be first paperback edition)
H-017 (back cover)
H-023 GEORGETTE HEYER Arabella (1967)
H-024 CHARLES FORT The Book of the Damned (c. 1962; 1967; occult/paranomal)
The Book of the Damned was originally published as ACE K-156 (1962) with a preface by Donald A. Wollheim.
H-025 JAN TEMPEST (aka IRENE MAUDE SWATRIDGE) House of the Pines (cover by Lou Marchetti; c. 1946; 1967; 1st thus; ACE Gothic Novel)
H-028 JACQUES and JANINE VALLEE Flying Saucers: A Challenge to Science (1967; ACE Star edition; occult/paranormal)
H-031 DOROTHY EDEN Sleep In The Woods (1960; cover by Shannon Stimweis; ACE Historical/Romance Novel)
H-032 HAL ELISON Games (1967; 1st ACE printing and PBO; photo and graphic design cover)
H-035 DOROTHY EDEN The Daughters of Ardmore Hall (1967; ACE Gothic Novel)
H-037 CHARLOTTE HUNT (aka DORIS MARJORIE HODGES) The Gilded Sarcophagus (1967; 1st ACE printing; ACE Gothic Novel)
H-044 GEORGETTE HEYER The Quiet Gentleman (cover by Charles McVicker; 1968; 1st thus; ACE Romance)
H-045 GEORGETTE HEYER Venetia (1968; ACE Romance)
H-046 ROBERT L. SCOTT JR. Look of the Eagle (cover by Verne Tossey; 1968)
H-047 HANS HOLZER Lively Ghosts of Ireland (1968; occult/paranormal)
H-50 JANE T CAIRD In A Glass Darkly (alternate title: Murder Reflected; c. 1965; 1968: ACE Gothic Novel)
H-053 LESLIE H. WHITTEN Progeny of the Adder (interior illustration by Jack Gaughan; c. 1965, 1968; first thus; listed as "complete and unabridged")
H-055 WILLY LEY On Earth and In The Sky (1968; 1st ACE printing and PBO; non-fiction)
H-061 ELIZABETH SALTER Death in a Mist (c. 1957; 1968; 1st thus; ACE Gothic Mystery)
H-063 MIRIAM ALLEN deFORD The Real Bonnie & Clyde (1968; photographic images on cover and back; nonfiction)
H-063 (back cover)
H-064 BRINSLEY Le POER TRENCH The Flying Saucer Story (1st ACE printing; s'posed 1st U.S. publication; 1968)
H-068 RAYMOND BAYLESS The Enigma of the Poltergeist (1968; 1st thus; ACE Star edition; photo cover)
H-069 RONA RANDALL (aka RONA SHAMBROOK) Knight's Keep (1968; 1st thus; ACE Star edition; ACE Gothic Novel)
H-071 DOROTHY MACKIE LOW (aka LOIS DOROTHEA LOW) Isle For A Stranger (cover by Milton Lesser; c. 1962; 1968; 1st thus; ACE Gothic Novel)
H-074 CHARLES FORT New Lands (1968; ACE Star edition; occult/paranormal)
H-075 GEORGETTE HEYER Cotillion (1968; ACE Star edition; ACE Romance)
H-080 RONA RANDALL (aka MARGARET SUMMERTON) With Murder in Mind (1968; 1st thus: ACE Gothic Mystery Novel)
H-081 JOHN MACKLIN Passport To The Unknown (1968; occult/paranormal)
H-082 JANE BLACKMORE The Other Room (1968; ACE Gothic Novel)
H-083 BERNHARDT J. HURWOOD Vampires, Werewolves, and Ghouls (1968; 1st ACE printing and PBO; ACE Star edition)
H-087 REBECCA LISWOOD A Marriage Doctor Speaks Her Mind About Sex (1968; self-help)
H-088 CHARLES FORT Wild Talents (1968; ACE Star edition; occult/paranormal)
H-089 JOHN MACKLIN Dimension Beyond The Known (1968; 1st ACE printing and PBO; photocover)
H-094 JOHN MACKLIN Dwellers in the Darkness (1968; occult/paranormal)
H-096 SHIRLEY JACKSON The Sundial (1958; interestingly listed as "copyright to author only"; ACE Gothic Novel)
H-098 CHARLOTTE HUNT (aka DORIS MARJORIE HODGES) The Cup of Thanatos (1968; 1st thus: ACE Gothic Novel)
H-099 STEWART ROBB (translated and interpreted by) Prophecies on World Events by Nostradamus (1968; occult/paranormal)
H-106 JANE T CAIRD Perturbing Spirit (1968; ACE Star edition; ACE Gothic novel)
H-108 JOHN MACKLIN Challenge to Reality (1968; occult/paranormal)