Since the improbable became a way of life for Arthur Dent, he’s not surprised to find himself stranded on prehistoric Earth in a miserable cave. But when he hitches a ride out of the past and finds himself back where he started, he begins to wonder whether his life is ever going to make sense.

As the fate of the entire universe rests in his hands, Arthur is about to discover a secret about life, the universe and everything - it’s really staggeringly, stupidly unfair. The third book in Hitchhiker’s Guide Trilogy.