The Hitchhiker's Guide to the Galaxy
Hitchhiker's, as it is simply known to its fans, is a sci-fi comedy classic.
Douglas Adams has such delightful turns of thought, that one can forgive his complete bastardization of the word trilogy. Whether one forgives him or not is probably of no matter to Douglas Adams himself, as he has now booked a permanent table at the restaurant at the end of the universe, at which we will all one day find ourselves.
Its basic plot revolves around a man called Arthur Dent who is whisked off Earth shortly before it is to be destroyed to make way for an interstellar bypass and led around the galaxy by his friend Ford Prefect. Ford Prefect as it happens is a writer for the remarkable electronic book, the Hitch Hiker's Guide to the Galaxy, which is a terribly useful book to have should one require the occasional filler narrative in a trilogy in many parts you happen to be writing.
As they hurtle through space, they team up with Trillian the last remaining female human who herself has been lured from Earth by the galactic president, and generally cool and froody dude, Zaphod Beeblebrox, who had less than noble intentions both in saving Trillains life and in leading the galaxy.
Now for someone with my own turn of thought, I was thumbing through the book waiting for Trillian, the last human female, and Arthur, the last human male, to get it on and ensure the survival of the species. I can't remember whether they ever do get it on and so you will have to continue to live in suspense until you read it.
This is a great book, extremely funny, very, very geeky, and finally answers the question we've all been wanting to know - what is 7 times 6. To find the answer to that as well, you will just have to read the books.