Mark Galeotti is the go-to expert on organized crime in Russia, consulted by governments and police around the world. Now, Western listeners can explore the fascinating history of the vory v zakone, a group that has survived and thrived amid the changes brought on by Stalinism, the Cold War, the Afghan War, and the end of the Soviet experiment.

Rene "Boxer" Enriquez grew up on the violent streets of East L.A., where gang fights, robberies, and drive-by shootings were fueled by rage, drugs, and alcohol. When he finally landed in prison - at the age of 19 - Enriquez found an organization that brought him the respect he always wanted: the near-mythic and widely feared Mexican Mafia, La Eme. What the organization saw in Enriquez was a young man who knew no fear and would kill anyone - justifiably or not - in the blink of an eye.

Martin Corona, a US citizen, fell into the outlaw life at 12 and worked for a crew run by the Arellano brothers, founders of the Tijuana drug cartel that dominated the Southern California drug trade and much bloody gang warfare for decades. Corona's crew would cross into the United States from their luxurious hideout in Mexico, kill whomever needed to be killed north of the border, and return home in the afternoon. Martin Corona played a key role in the downfall of the cartel when he turned state's evidence.

In 2008 veteran journalist Evan Wright, acclaimed for his New York Times best-selling book Generation Kill and co-writer of the Emmy-winning HBO series it spawned, began a series of conversations with super-criminal Jon Roberts, star of the fabulously successful documentary Cocaine Cowboys. Those conversations would last three years, during which time Wright came to realize that Roberts was much more than the de-facto “transportation chief” of the Medellin Cartel during the 1980s, much more than a facilitator of a national drug epidemic.

The gun control debate is revived with every mass shooting. But far more people die from gun deaths on the street corners of inner city America and across the border as Mexico’s powerful cartels battle to control the drug trade. Guns and drugs aren’t often connected in our heated discussions of gun control - but they should be. In Ioan Grillo’s groundbreaking new work of investigative journalism, he shows us this connection by following the market for guns in the Americas and how it has made the continent the most murderous on earth.