What book features the answer to life the universe and everything?

Answer 1

The Hitchhikers Guide to the Galaxy (published in 1979), is a Science Fiction series written by Douglas Adams. It was first a radio comedy, which eventually became an international multi-media phenomenon. They were later adapted into several books, they were originally a trilogy however there are now five books published.

Answer 2

The book that features the answer to life, the universe, and everything is "The Hitchhiker's Guide to the Galaxy" by Douglas Adams. In the book, the answer is revealed to be the number 42, although the actual question remains unknown.

Answer 3

Actually this ultimate question (and the corresponding answer "42") has been popularized by Douglas Adams' well-known book "The Hitchhiker's Guide to the Galaxy".