This could have been an interesting and provocative book, but unfortunately, it's full of huge amounts of lazy and ignorant writing that not only repeats various lies but appears to invent some completely new ones - at least, I couldn't find where they originated. For example, Donald claims that Pope Gregory the Great 'openly proclaimed it to be heresy to denounce the concept of a flat earth': Donald gives no source for this claim, which is probably sensible, since it's nonsense. Almost all western theologians were perfectly happy with the Ptolemaic theory of a spherical earth, though a handful of eastern bishops of the Antiochian school preferred a literal reading of Biblical phrases like 'the four corners of the earth'.
Ironically, considering the author's dislike of anything remotely religious, he has a dogmatic approach to 'science', resulting in what one call a QI approach to facts: anything that's currently believed by ordinary people is almost certainly wrong, and I, the omnipotent author, am going to reveal to you what is REALLY the case. However, he fails to understand that even modern science is frequently inconclusive, and that researchers often disagree with each other. He's very keen, for instance, to explain that the Black Death had nothing to do with rats, a theory which he describes as possessing 'overwhelming evidence': in fact, the evidence is neither overwhelming nor generally accepted, as the historical and medical evidence can be interpreted in many different ways. Here and in many other chapters, the only sources he refers to are those which he agrees with.
Overall, unless you, like me, have Kindle Unlimited, don't bother with this book; and if, like me, you download it using Kindle Unlimited, I recommend that you delete it. It's certainly not worth real money, and not worth the time you'll spend reading it.