Sportswriter Joe Posnanski and TV writer Michael Schur say their new book is for everyone who has risked their emotional health over a sports team. Big Fan took the co-authors across the United States and beyond as they investigated fans of football, chess, Taylor Swift and more. In today’s episode, they tell NPR’s Scott Simon about how a video from the Worlds Dart Championship led them on their international tour of deep fandom.To listen to Book of the Day sponsor-free and support NPR's book coverage, sign up for Book of the Day+ at plus.npr.org/bookofthedaySee pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences.NPR Privacy Policy