never split the difference copywriting the challenger sale english books zero to one bible the upside of irrationality the power of positive thinking #0 brand originality predictably irrational og mandino the rules of work word by word the story of food content network marketing vietnam 48 laws of power getting to yes principles ray dalio marketing the intelligent investor start with why lean in thinking fast and slow saying of youth hunger games principles how business works atomic habit 13 reasons why think fast and slow how psychology works how emotions are made this is marketing 80/20 principle the leader who had no title marketing 5.0 everybody up 1 philip kolter the economics book penguin classics hooked harvard donald miller the world is flat secret of the millionaire mind how brands grow how management works philip kotler