Les gave me this book. If you've seen him in person the book makes sense, and its almost enjoyable. The way he applies improvisation to life is helpful. When we have fun and embrace challenges in a spirit of play, we do much better than the compulsive-take-things-seriously people.
But if you haven't met Les, I'd imagine the book would come across as a little pushy and unclear. He needs to add an introduction: "Meet Les, who's insane, fun, irreverent, and a genius." After you read that, you'll understand his tone and content much more easily. Consider yourself helped, everyone.