The cancelled Taliban talks, John Bolton’s departure, and guest Paul Tough’s new book The Years That Matter Most.For this week’s Slate Plus bonus segment, Emily, David, and John debate the ideal length for books and movies.You can tweet suggestions, links, and questions to @SlateGabfest. Tweet us your cocktail chatter using #cocktailchatter or post it to our Facebook page. (Messages may be quoted by name unless the writer stipulates otherwise.) The email address for the Political Gabfest is [email protected]. (Email may be quoted by name unless the writer stipulates otherwise.)Podcast production by Jocelyn Frank.Research and show notes by Bridgette Dunlap.Learn more about your ad choices. Visit megaphone.fm/adchoices