The Hitchhiker's Guide to the Galaxy is a book with the invaluable words on the cover which inform the reader not to panic. It can also tell you everything you need to know about anything - which might be very useful for Arthur Dent who is in the unfortunate position of being one of the few humans still alive...
after the earth was unexpectedly demolished to make way for a new hyperspace bypass. He will also find himself living in a hideously miserable cave on prehistoric earth.
And with the added thrills of parallel universes, two headed aliens, God's Final Message and...mice...it seems like a book that you need to have with you at all times.
This set contains The Hitchhiker's Guide to the Galaxy, The Restaurant at the End of the Universe, Life, The Universe and Everything, So Long and Thanks for the Fish and Mostly Harmless.