A poor book. As it says, there are many contributors, but so many that I doubt Trump was actually told the advice or even read them. Most are a single phrase and obvious. For some, that phrase is the only thing on a page. Many are less than a single page - phrase and all. Some are several pages long and include a short war story. Let's put it this way, if you haven't learned this advice from your parents and teachers when you were growing up then its probably too late. But the best advice is unwritten...cash in on other people's work. I expected something rather more intellectual.