Life, the Universe and Everything: the unimssable The Hitchhiker's Guide to the Galaxy Part Three.
In consequence of a number of stunning catastrophes, Arthur Dent is surprised to find himself living in a hideously miserable cave on prehistoric Earth. However, just as he thinks that things cannot get possibly worse, they suddenly do. He discovers that the Galaxy is not only mind-boggingly big and bewildering but also that most of the things that happen in it are staggeringly unfair.
VOLUME THREE IN THE TRILOGY OF FIVE.