we're going to david novak, co-founder and chairman of yum. yum is still doing pretty darn well. w leaders learn" comes out tomorrow. it's about the essential habits and strategies of the world's effective leaders. tonight we're lucky enough to have david back on set with us to learn more. mr. novak, welcome back to "mad money." >> jim, it's always a pleasure being with you. a pleasure to see you. >> i listen to your podcast. you have great wisdom, even more than when you were running the joint. i got tell you, this book is terrific. and i want to focus on some of the people people may not have heard of, because you have some great leaders throughout this. and i want to start by saying what do you do when you inherit a company where the culture is broken? what do you do when you're charliecharlie sharp is crowe o wells fargo. he went in there and had to deal with a lot of stuff. they had 13 consent orders, knocking all those down. but he had to build accountability into the organization. he had to let everybody know that he believes in them. but he had to tackle the hard stuff. th