by Donald A. Wollheim.

New York: Paperback Library, Inc., (1966).

First paperback edition, first printing; mass-market paperback.

"First printing October 1966" statement to the copyright page.

The sixth of eight books in the space adventure Mike Mars series.

A well preserved mass-market paperback collectible.

Short, mild bend/crease to the upper edge and lower corner tip of the front cover, else near fine, very tight and unread, square, crisp and bright in glossy stiff-card wraps with uncredited front cover art of Mike Mars wielding a space gun in front of a NASA X-15 space plane, all page edges orange; printed code 56-358 and .45c price still intact to the front cover and spine.

*(No fading nor creases to the spine.)

126 pages; plus 2 pages of ads. to the rear.

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