do you want to tell us about craig lewis and that story. >> he -- this is a love story. these were two people very much in love and craig lewis was an engineer for the city of houston. another guy who was obsessed with making things work better, and he had been healthy all his life, and then he got sicker and sicker and sicker, and it took very long time for the doctors to understand what was wrong with him. he ended up having a disease called amyloidow sis which he was in total organ failure you can't just be a surgeon and decide we'll try this artificial heart and put it in this guy. bud went to the fda and got something -- you have to go through several steps to get what is called emergency use permission, to put this in a person. and lewis -- i think one of the interesting things about the book is when faced with having more time, no one knows how much more time, or dying in a very short time, most of the people i wrote about opted for a little more time, and lewis especially was fascinated how this machine would work, and said, let's try. and he lived for about i th