We dive into the thorny issue of passport privilege thanks to this week’s guest, Shahnaz Habib, author of the new book Airplane Mode: An Irreverent History of Travel. Why do some travelers gain more visa-free access than others? Who determines how a place is seen through the lens of its guidebooks? And what does the word "wanderlust" mean, exactly? Shahnaz seeks to answer all that and more, and shares some of her own travel stories.