Back on Earth with nothing more to show for his long, strange trip through time and space than a ratty towel and a plastic shopping bag, Arthur Dent is ready to believe that the past eight years were all just a figment of his stressed-out imagination. But a gift-wrapped fishbowl with a cryptic inscription, the mysterious disappearance of Earth's dolphins, and the discovery of his battered copy of The Hitchhiker's Guide to the Galaxy all conspire to give Arthur the sneaking suspicion that something otherworldly is indeed going on. . . .

God only knows what it all means. And fortunately, He left behind a Final Message of explanation. But since it's light-years away from Earth, on a star surrounded by souvenir booths, finding out what it is will mean hitching a ride to the far reaches of space aboard a UFO with a giant robot. But what else is new?

道格拉斯·亚当斯（1952—2001），英国作家，毕业于剑桥大学。主要作品就是银河系漫游五部曲。包括《银河系漫游指南》、《宇宙尽头餐馆》、《生命、宇宙及一切》、《再见，谢谢鱼》和《基本无害》。这个系列被西方科幻读者奉为“科幻圣经”之一。由于银河系漫游系列小说的突出成就，国际小行星管理委员会甚至还将一颗小行星命名为阿瑟·邓特——该系列的主人公。

2001年，亚当斯因心脏病猝发离世——此前正在与好莱坞制片商合作，共同将《银河系漫游指南》搬上银幕。2005年4月29日，由迪斯尼公司拍摄的《银河系漫游指南》正式公映。首映周便获得二千一百七十多万美元，成为当周北美票房冠军。