Why do book reviews include long plot outlines?
So the audience for the book (and therefore the book review) would be people who have a passing interest and might have that interest further piqued by an anecdote or interesting story from from his life. I’ll second that. I often know little to nothing of what a book is about when I read a review, so I prefer reviews to have a synopsis. If I do already know what a book is about, it’s usually easy enough to skip over that part. That said, I agree that the linked review overdoes it.