I started reading this today and it screams "amateur" to me. Obviously it was a vanity publication, and it seems that Banks has some kind of axe to grind. In her acknowledgments she dedicates a song to anyone who "is a bully."
The run on sentences are clunky, and they make it feel like a ninth grade paper. My guess is that not enough people saw the manuscript before it went to press, and therefore there is no way to be able to trust the spelling or grammar. This doesn't make me feel comfortable trusting it as a source, especially since, as Helen R pointed out, the bibliography is so inadequate.
Also, the very last page in the book thanks "The Doctor" for time traveling back to 1942 to get the Livadia photos. (?)