Reporter David Sanger has covered five American presidents for The New York Times. But in today's episode, he tells NPR's Mary Louise Kelly that there's an unpredictability to the politics of today — particularly on an international stage. His new book, New Cold Wars, analyzes how the ties between the United States, Russia and China have rapidly evolved in recent decades, and how technology, military intelligence and economic sanctions play into the conflict 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/bookoftheday Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy