Spine/covers a bit creased, corners bumped, minor edge wear/chipping. Slight yellowing, but text block is clean and unmarked.
Includes a preface to the 1967 edition and an introduction to the 1987 edition, both by Clarke.
"When a celebrated science fiction writer takes to space on his first trip to Mars, he stumbles upon Mars' most carefully hidden secrets and threatens the future of the entire planet!"; 12mo - over 6¾" - 7¾" tall