Toby Muse spent almost two decades as a foreign correspondent in Colombia, where he traveled to dozens of places affected by the war on drugs and recorded innumerable conversations with people—participants in the drug trade, officials, reformers, and victims caught in the middle. His new book, Kilo: Inside the Deadliest Cocaine Cartels – From the Jungles to the Streets, draws heavily from all of his conversations. It comes out on March 24, 2020.