"One of the year's most important books, a gripping meticulously reported account of the rise of one of the world's most notorious street gangs." —Mitch Weiss, Pulitzer Prize winner Winner of the Lukas Prize An NPR Best Book of the Year The MS-13 was born from war. In the 1980s, Alex and his brother fled El Salvador for the US and formed the Mara Salvatrucha Stoners. Initially bound by a love of heavy metal music, the group soon took on a harder edge, selling drugs, stealing cars and killing rivals. Gang members like Alex were incarcerated and deported. But in the prison system, the group only grew stronger. Today, MS-13 is one of the most infamous street gangs on earth—and also largely misunderstood. Longtime organized crime investigator Steven Dudley brings readers inside the nefarious group to tell a broader story of flawed US and Central American policies and the exploitative, unequal systems that shape them. "A remarkable feat of reporting; the ways in which the United States is complicit in the creation and preservation of MS-13 might well keep you awake deep into the night, as it did me." —Rachel Louise Snyder, author of No Visible Bruises "By detailing the experiences of gang members and victims alike, he anatomizes the complex, fluid dynamics of this elusive transnational network. A startling book." —Patrick Radden Keefe, New York Times–bestselling author of Rogues: True Stories of Grifters, Killers, Rebels and Crooks "The definitive account of MS-13 . . . An outstanding book for true crime readers." —Library Journal (starred review)