Bill Clinton On The Invention Of Air

A few weeks after the book tour for The Invention of Air started to wind down, I got an email from an old friend who had spent some time with Bill Clinton at Davos. It was a quick note to report that Clinton had apparently spontaneously brought up my book in conversation, and had said some nice things about it. 

That was very cool to hear, obviously, but hearing it immediately introduced a whole new set of questions: how had he heard about the book? What exactly did he like about it? And was this