It depends on what you want to tell. You can discuss how you agree/disagree with someone as polarizing as Uncle Bob in the context of the book, which, if I can go by his previous books, contains a lot of his personality. Or you write an objective critique of the book. Or maybe something entirely different.

When I read a post entitled "A critique of...", I expect an objective analysis of the information provided by the book, not jabs at the author. I hope this is helpful.