ロバート・シルヴァーバーグ

Collision Course is a novel by science fiction author Robert Silverberg first published in hardcover in 1961 by Avalon Books and reprinted in paperback as an Ace Double later that year. Ace reissued it as a stand-alone volume in 1977 and 1982; a Tor paperback appeared in 1988. An Italian translation was also published …