I am not sure that I would call this book historical and the author makes some amazing assumptions in (my version) 272 pages.
I mean you start with Ancient Egypt, sprint off to the Bible, have a look at early Christianity , take a look at Gothic Churches, Chartres Cathedral, The Black Madonna, The Tarot, The Templars, The Rosslyn Chapel and did I mention the book is only 272 pages long with pictures.
If your into the DaVinci code this is for you.