Anna Goldfarb has been called "the New York Times Friendship correspondent," and with a title like that how could I resist? We talk about her great new book Modern Friendship, which is an extremely practical approach to building and keeping friendships, but above all to seeing their value, and making intentional choices about them. We talk about the fact that there's only one source of good data on international friendship (but plenty of data on 5,000 other things), the dangers of friendship Cheetos, and the social foibles of squid.