Avon Books, 1977. Image via Too Much Horror Fiction
HBJ/Jove, 1978. Image via Too Much Horror Fiction
Bantam Books, 1975. Image via Too Much Horror Fiction
Beagle Books, 1971. Image via Too Much Horror Fiction
Cover art by Rowena Morrill, 1978. Image via Too Much Horror Fiction
Dell Abyss, 1991. Image via Too Much Horror Fiction
Cover art by Ian Miller, 1973. Image via Too Much Horror Fiction
Cover art by William Teason, 1962. Image via Too Much Horror Fiction
Image via Too Much Horror Fiction
Cover art by Michael Whelan, 1983. Image via Too Much Horror Fiction