One of two books I remember reading in honor of the millennium; the other was Stephen Jay Gould's Questioning the Millennium. So one look back and one look forward. The look back was fascinating. Although I know more about the history of the British isles than any place outside the US it remains impenetrable to me.
I enjoyed it quite a bit, of course, I'm the sort of person who walks out of any historical film discussing how well they did in recreating the period. for England the answer is almost always "not enough sheep."