I did see, however, that one reviewer commented that the book was not well researched, without elaborating. If that is true, one won't know what is correct what not. It is, however, easier to allege than to publish a glossy fullsize book, so for now I am siding with the book, and recommending it.

Another reviewer wrote that he's already bought a number of copies, as it makes a wonderful gift. I wholeheartedly agree!