All products featured on GQ are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission. Tim Grover isnât exactly a conventional trainer, but his career speaks for itself: the guy has trained some of the greatest basketball players of the last two decades. A performance coach for Michael Jordan, Kobe Bryant, Dwyane Wade, and dozens of other greats, Grover seems to be pretty good at teaching people how to win. So his new book, aptly titled Winning, breaks down every piece of the mindset that made his players champions, whether itâs accessing your dark side (a.k.a. the infamous Mamba Mentality), controlling your emotions, or mastering what he calls âthe art of no.â Theyâre formulas for success on or off the court, which means you donât need to be in the NBA to chase down what he calls the âultimate drugââconfidence.Â