The history of the universe, man's interpretation of it, his place within it down the ages, an overview of the interaction of the disciplines of philosophy, religion and science from Aristotle to the present day, an easily understood explanation of the physics, chemistry and biology that underpin our universe as we perceive it and all presented in an inquiring and undogmatic way.
Whew! What else does an interested layman need on the subject? This is one of the few "must keep" books one will ever read - that is if the reader values understanding the "meaning of life" in so far as he is capable of understanding it at all! That limitation is made abundantly clear.
Mr. Potter's writing flows, is unaffected (unusual for the genre) and reeks of authority acquired over a lifetime of dispassionate and intelligent observation. Also, surprisingly for a book that out-Hawkings Hawking, a stonking good read from start to finish. Wow factor 10/10.