You'd be surprised at what gets published these days! Anyone can write a book, whether they know the facts or not.
I bet I could write a book about car engines -- and I don't know a DARN THING about them. LOL And I could probably get it published too, just because I'm female -- how many females have written a book about car engines? See? I'd be marketable!
You just can't believe everything you read, that's for sure.
Take care, and try not to let it get you too upset. The author obviously is an idiot.

God bless and please take care. Hugs, Lee