Late Show Book Club chats with Sophie Elmhirst, author of "A Marriage at Sea," our August book club pick. Find out what Sophie thinks is the key to surviving a shipwreck, what she learned about relationships from Maurice and Maralyn Bailey, and her advice for aspiring writers. #LateShowBookClub #SummerReading #Colbert #AMarriageAtSea #SophieElmhirst #Books Subscribe To "The Late Show" Channel: http://bit.ly/ColbertYouTube Watch full episodes of "The Late Show": http://bit.ly/1Puei40 Listen to "