I was disappointed because I expected this book to be more scholarly and based in fact like 'Holy Blood, Holy Grail'.
To make matters worse he presented his 'facts' in such a flippant manner that by halfway through the book I doubted just about everything he said.
Once I'd got to that point I had to change tack and read the book as an ordinary thriller.
That didn't help much as I found most of the codes pathetically easy to crack (and from experience I know I don't have much of a talent with sequences). The characters were 2d cardboard cutouts, the language style was second rate and the plot had such large holes it resembled a gruyere while being not nearly as tasty.
Oh and just a thought but in the 21st century sex isn't that shocking anymore.