It's 100% worth the read. It's the reason to this day most people in my age demo opt to return serve first. It was drilled into us by all coaches, who had also read Winning Ugly. It also gave me some good, albeit obvious, insight into inner game dynamics e.g. 15-30 / 30-15 are always the most important points in games, etc.Is it good? I’ve always resisted it because his self promotion is so off putting to me. Always reminding everyone when he made a good pick. Always hyping young players who are obviously going to be great and trying to make it sound like a big statement. Like, “People think Sinner is going to be good, but I actually think he’s going to be next level good.” But I should still probably read the book. I’ve seen it at Goodwill.