Heechee Rendezvous

Heechee Rendezvous is a science fiction novel by the American writer Frederik Pohl, published in 1984 by the Del Rey imprint of Ballantine Books. It is a sequel to Gateway (1977) and Beyond the Blue Event Horizon (1981) and is set about three decades after Gateway. It has been cataloged as the third book in a six-book series called Heechee or The Heechee Saga but Kirkus reviewed it as completing a trilogy and a German-language edition of the three books was published as the Gateway trilogy after all six were out.