A beautiful looking general overview that is of the type I *think* you are looking for, is:
Archaeology: The Essential Guide to Our Human Past, by Paul Bahn. I have that one on hold at my local library.
Sadly, once again, only available in print AFAIK.
ETA 2/26: FWIW, picked this up today, wow this book is an impressive one-volume overview from Smithsonian books. The full size photos and diagrams are stunning; for example I was just looking at the chapter about Egypt. So if you want a recent book and are willing to forego the ebook requirement, the pictures alone in this thing are a reminder of why, sometimes, paper books are still the way to to go. This is so good I'm thinking about buying a copy. A good blurb is
here.