"This million-headed monster had a single-minded mission"--Cover of Enigma from Tantalus
"The body-snatchers from Beyond"--Cover of The repairman of Cyclops
Enigma from Tantalus: "Cover by John Schoenheer; interior sketches by Emsh and Gaughan"--Title page verso. The repairmen of cyclops: "Cover by Jack Gaughan"--Title page verso.
With:
Titles bound back to back and inverted (tête-bêche format), each with its own title page.
Issued (inverted) with the author's The repairmen of cyclops.