Off the top, Lee Iacocca’s book “Where have all the Leaders Gone”. Great book, couldn’t put it down, on the qualities and charcteristics of a great leader. The book lists the 9Cs. I applied this to the recent Presidential race. Another book, that is well known and is good for beginners, and can be used as a refresher is “What Color is Your Parachutte?” there’s a recent edition just came out last year. Still is a great job hunting resource and a career evaluator. I’m sure I’ll think of some others later but these two have come to my mind.