Paul Jordan, who studied archaeology at university, is a pretty good writer in my opinion. I quite enjoyed this book, which I got for a project on Atlantology and alternative archaeology. It's one of the few books by a skeptic to give in-depth coverage to some of the newer writers like Graham Hancock and the Flem-Aths. Reading this would be a good way to decide whether you want to invest the time in reading their (rather long) books.
There is a section on traditional/academic accounts of human origins and prehistory, which seems misplaced. Jordan is trying to provide the accepted account along with some of the evidence so that his readers have the necessary information to follow his critique. But I found it disrupted the flow of the book. I wonder whether it would have been possible to integrate it into the Atlantology sections, or move it to a long appendix. It's easy enough to skip over if you know a little about prehistory, and it doesn't significantly detract from the book as a whole.
I've also read Jordan's book on the Sphinx, which is more of a picture book or coffee table book. If you are familiar with his Sphinx book, expect more text and substance from this work.
There are some illustrations in a photo section of the book. Some of them seemed pointless to me, until I finally reached his explanation near the end. Good job, Jordan!