In my 78 years I’ve read a few books, and the best one I’ve ever read, page for page, is Eric Hoffer’s little 1950s gem, The True Believer. It won’t do a thing for your business careen, directly, but it will give you the key to how you and others relate to each other, indirectly. If, however, you yourself are the true believer type, reading it would be a waste of time.