I had started to read it, but now can't seem to find it. I recall awhile ago, that there was a progressive website where Thom had his book online. Thom reads from his book Last Hours of Ancient Sunlight and about the lives of the ancients. If you search for 'last hours of ancient sunlight' on this site you will find several. It wasn't a PDF file, it was simply posted on some website.
Request PDF on ResearchGate Book Review: The Last Hours of Ancient Sunlight This is a revision of a Book Review of EE to increase the readability of its original work.