Dr. Stuart Firestein is chair of the Department of Biological Sciences at Columbia University and professor of neuroscience. He has written two very short but brilliant books, Ignorance: How it Drives Science (2012), and Failure: Why Science Is So Successful (2015). We humans tend to focus on what we (think) we know, but Firestein argues in these books that it is the unknown that is what is really interesting and important, and what really drives progress in science. Highly recommended.