“A very real first-hand account of the gritty, brutal world of trafficking. Heifner’s incredible journey will transport you into the pounding heart of the War on Drugs. You won’t want to put this book down.”
—Robert Mazur, former DEA agent and author of The Infiltrator: My Secret Life Inside the Dirty Banks Behind Pablo Escobar’s Medellín Cartel

“Mule contains all the dread, angst, and psychological terror of a Hitchcock movie. It’s a must read for people interested in the US–Mexico drug trade.”
—Howard Campbell, professor of anthropology and author of Drug War Zone: Frontline Dispatches from the Streets of El Paso and Juárez