The deeply reported story of identical twin brothers who escape El Salvador's violence to build new lives in California - fighting to survive, to stay, and to belong.

Growing up in rural El Salvador in the wake of the civil war, Ernesto Flores had always had a fascination with the United States, the distant land of skyscrapers and Nikes, while his identical twin, Raul, never felt that northbound tug. But when Ernesto ends up on the wrong side of the region's brutal gangs, he is forced to flee the country, and Raul, because he looks just like his brother, follows close behind - away from one danger and toward the great American unknown.

In this urgent chronicle of contemporary immigration, journalist Lauren Markham follows the 17-year-old Flores twins as they make their harrowing journey across the Rio Grande and the Texas desert, into the hands of immigration authorities, and from there to their estranged older brother's custody in Oakland, CA. Soon these unaccompanied minors are navigating a new school in a new language, working to pay down their mounting coyote debt, and facing their day in immigration court while also encountering the triumphs and pitfalls of life as American teenagers - girls, grades, Facebook - with only each other for support. With intimate access and breathtaking range, Markham offers a coming of age tale that is also a nuanced portrait of Central America's child exodus, an investigation of US immigration policy, and an unforgettable testament to the migrant experience.