So Long, And Thanks For All The Fish, by Douglas Adams
(Fourth book in "The Hitchhikers Trilogy". Yes, you correctly read that).
Paperback in Very Good Condtion
“A madcap adventure . . . Adams’s writing teeters on the fringe of inspired lunacy.”—United Press International
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. 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?
“The most ridiculously exaggerated situation comedy known to created beings . . . Adams is irresistible.”—The Boston Globe