Description: The Late Show Book Club chats with Ian McEwan, acclaimed author of "Atonement" and the new novel "What We Can Know," our October book club pick, about the real poem that inspired this story, whether writing has become easier for him after 19 novels, and his favorite advice for aspiring writers. #LateShowBookClub #Colbert #WhatWeCanKnow #IanMcEwan #Books Subscribe To "The Late Show" Channel: http://bit.ly/ColbertYouTube Watch full episodes of "The Late Show": http://bit.ly/1Puei40