Ace (F-293) 1964 paperback. Cover by Ed Valigursky, 191 pages, 40 cent cover price. Condition is VG (minus): tight and square; spine has no creases. Age-tanning is mild and uniform - average for its age (darker on insides of covers.) Front cover has light wear, mainly as 2 or 3 finger-creases (1"); back cover has moderate to heavy wear: 3" diagonal fold-trace at lower left corner, faint vertical line (1-1/2" away from spine) and other light wear and faint scuffing whigh may not show in scan. No stamps or writing, but right edges of pages 109 and 113 have a 1/8" by 1" mark of ink? with slight associated spatter on page 109, trace on page-block edges, and bottom right corner of inside back cover.

Moon Base: serialized in New Worlds April, May & June 1963 - as "Window on the Moon." There was a British hardcover (1964) and paperback (1967) - this was the only American edition until Wildside reprinted it in 2002 (with a $14.95 cover price.) Every book appearance has the title Moon Base.

Felix Larsen had been sent to Luna Station to investigate "something odd on the Moon." He is drugged asleep as soon as he arrives, making him doubly careful because now he is sure there is someone aware of his secret mission - waiting for the critical moment.