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Beyond This Horizon is a science fiction novel by Robert A. Heinlein. It was originally published as a two-part serial in Astounding Science Fiction and then as a single volume by Fantasy Press in 1948.

Between Planets is a science fiction novel by Robert A. Heinlein, originally serialized in Blue Book magazine in 1951 as "Planets in Combat". It was published in hardcover that year by Scribner's as part of the Heinlein juveniles.

Assignment in Eternity, is a collection of four mixed science fiction and fantasy novellas by Robert A. Heinlein, first published in hardcover by Fantasy Press in 1953, with some of the stories somewhat revised from their original magazine publications, as follows: Gulf. Lost Legacy Elsewhen, Jerry Was a Man Heinlein …

Assignment in Eternity, is a collection of four mixed science fiction and fantasy novellas by Robert A. Heinlein, first published in hardcover by Fantasy Press in 1953, with some of the stories somewhat revised from their original magazine publications, as follows: Gulf. Lost Legacy Elsewhen, Jerry Was a Man Heinlein …

Robert A. Heinlein is widely and justly regarded as the greatest practitioner of the art of science fiction who has ever lived. Here are two of his greatest short novels:GULF: In which the greatest superspy of them all is revealed as the leader of a league of supermen and women who can't quite decide what to do with …