Creativity is what you do in your head to generate an idea, while innovation is the process of putting it into practice. You need both to succeed, which may be why the number of new books on these topics seems to grow every year. Yet despite the popularity of this category and the steady stream of new books, I continue to go back to the classics, those books that actually taught me how to do it versus those books that just talked about it. Caution – these are not “light reads,” but they’re the ones I’ve learned the most from.