Mass Market Paperback. If not for this, book would be NF or better. Missing Men of Saturn. John C. Winston Co., 1953. Cover illustration is intact and a decent example.
DJ is in protective covering.
Book shows minute edge wear, spine is straight and tight, corners very lightly bumped. There is a brief, tasteful gift inscription on the half-title. City on the Moon and Men on the Moon. Mass Market Paperback. Edges and corners bumped and rubbed, spine lightly bumped and creased.