羅伯特·海萊因

Time for the Stars is a science fiction novel by Robert A. Heinlein published by Scribner's in 1956 as one of the Heinlein juveniles. The basic plot line is derived from a 1911 thought experiment in special relativity, commonly called the twin paradox, proposed by French physicist Paul Langevin.

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 …