I was rather disappointed in this book. The scope of it ended up limiting the usefulness.
Also, I would perhaps have structured it in such a way as not to waste so much space, (which not only wastes paper but makes the book very bulky physically speaking).
In it's current format, one cannot really look up events unless you know the exact date on which they ocurred, and if you already know that, you probably already know more about the event than the book has to offer...
It's fine as a coffee table book to browse through, but it's less useful as a tool when more focussed study is involved.