This book seemed promising at first, with the author's heart in the right place, but fairly quickly I started to take a dislike to the author's style and the presentation of content. Now I might be accused of being "one without ears to hear or eyes to see", but this book is disjointed, meandering and at times confusing. There are a great number of spelling and simple grammatical mistakes, implying a lack of peer review. There are indeed some interesting points made in this book and interesting theories raised but its a pity that the reader has to trawl through so much waffle in order to distil any useful information.
A couple of examples from the book that totally destroy any hope of credibility in what the author is trying to claim are when he says Leonardo da Vinci was "persecuted and threatened to be burned at the stake" for saying "the Earth was not the centre of the universe, but that it revolved around the sun". This was of course Galileo and not Leonardo da Vinci. Another quote is about the last Templar leader, having been tortured and then wrapped in a cloth that "became known as the Shroud of Turin and the author's arguments for this claim are superbly grounded in fact". However these "facts" are never presented to the reader, we just have to accept it as true. These examples are typical of how the information is presented in the book, often without reference or just as opinion.
Finally the author's position on climate change not being a result of human activity and just a result of the sun's natural cycle was just too much for me. Again an opinion of the author, going against all scientific research showing the effect of human activity and carbon emissions, but believing that it is enough to just say that it is the sun, without presenting any evidence of his own as to why it is the sun and not human emissions. Typical of a person who believes that they have a right to an opinion, but not realising that it doesn't mean your opinion is right.
If you're interested in the topic of possible lost civilisations and alternative archaeology then I would recommend Graham Hancock's books any day over this one. Hancock is just a better writer and much more professional in his presentation of information.