Rocketship Galileo; Beyond This Horizon; Space Cadet; The Red Planet; The Day After Tomorrow; Farmer in the Sky (Robert Heinlein Science Fiction Collection) (Six volumes)

Six mass market paperbacks, in laminated, illustrated light card covers.  12mos.  Some gentle edge wear to card covers, a couple of mild reading creases.  Internally a hint of page toning else neat, clean and tight. A collection of Robert Heinlein's science fiction full length novels, the first six to be published.  The Day After Tomorrow was later published under the title Sixth Column; Farmer in the Sky was also serialised in condensed form under the title Satellite Sky.