The Ultimate Hitchhiker's Guide to the Galaxy collects five of Douglas Adams's classic science fiction works in one volume. This series takes readers on a hilarious journey through space and time with Arthur Dent, a man who finds himself an unwitting adventurer in the cosmos after the Earth is destroyed to make way for a galactic freeway.

The Hitchhiker's Guide to the Galaxy: Arthur Dent discovers the meaning of life (or lack thereof) with the help of Ford Prefect, Zaphod Beeblebrox, and the depressed robot Marvin.

The Restaurant at the End of the Universe: Arthur and company search for a decent meal, leading to encounters with bizarre beings and escapades across the galaxy.

Life, the Universe and Everything: Our heroes confront the sinister inhabitants of planet Krikkit who, tired of gazing upon the universe, decide it's high time to destroy it.

So Long, and Thanks for All the Fish: Arthur Dent returns to Earth, questioning his past interstellar adventures, but a cryptic gift reminds him that reality is often stranger than fiction.

Mostly Harmless: Just as Arthur starts to settle into a semblance of normal life, chaos ensues, and he must navigate further cosmic conundrums.

Also included is the short story "Young Zaphod Plays It Safe", which offers more of Adams's trademark wit and insight into the human condition—albeit from the perspective of extraterrestrial beings and the odd, often perplexing universe they inhabit.