According to the U.S. Bureau of Labor Statistics, one in nine Americans works in sales. Every day more than 15 million people earn their keep by persuading someone else to make a purchase. But dig deeper and a startling truth emerges: Yes, one in nine Americans works in sales. But so do the other eight. Whether we’re employees pitching colleagues on a new idea, entrepreneurs enticing funders to invest, or parents and teachers cajoling children to study, we spend our days trying to move others.

We've all seen the happiness on the face of a child while playing in the school yard. Or the blissful abandon of a golden retriever racing across a lawn. This is the joy of play. By definition, play is purposeless, all-consuming, and fun. But as Dr. Stuart Brown illustrates, play is anything but trivial. It is a biological drive as integral to our health as sleep or nutrition. We are designed by nature to flourish through play.

Everyone knows that timing is everything. But we don't know much about timing itself. Our lives are a never-ending stream of "when" decisions: when to start a business, schedule a class, get serious about a person. Yet we make those decisions based on intuition and guesswork. Timing, it's often assumed, is an art. In When: The Scientific Secrets of Perfect Timing, Pink shows that timing is really a science.

Most people believe that the best way to motivate is with rewards like money - the carrot-and-stick approach. That's a mistake, says Daniel H. Pink (author of To Sell Is Human: The Surprising Truth About Motivating Others). In this provocative and persuasive new book, he asserts that the secret to high performance and satisfaction - at work, at school, and at home - is the deeply human need to direct our own lives, to learn and create new things, and to do better by ourselves and our world.

Donald Trump and Robert Kiyosaki are both concerned. Their concern is that the rich are getting richer, but America is getting poorer. The entitlement mentality is epidemic, creating people who expect their country, employer, or family to take care of them. And like the polar ice caps, the middle class is disappearing. America is becoming a two-class society, and soon you will be either rich or poor. Trump and Kiyosaki want you to be rich.