On the afternoon of her niece's fifteenth birthday, Lydia finds herself pushed into her worst nightmare.

As she and her son Luca hide in the bathroom shower stall, the rest of her family is gunned down by members of Acapulco's most notorious drug cartel to make an example of her journalist husband. Lydia's survival instincts kick in immediately, and before the bodies of her family have cooled on the patio, she and Luca are fleeing for their lives. With roadblocks on every highway and the police in the cartel's pay, Lydia quickly realises two things: that they must cross the US/Mexico border as quickly as possible, and that they cannot risk travelling by road. For Lydia and Luca, the most dangerous route is the only route - riding illegally atop the freight trains, known as la bestia, hidden amongst the thousands of migrants who will risk everything in the desperate hope of a new start in the United States. Read an excerpt from Jeanine Cummins' American Dirt below. 

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One of the very first bullets comes in through the open window above the toilet where Luca is standing. He doesn’t immediately understand that it’s a bullet at all, and it’s only luck that it doesn’t strike him between the eyes. Luca hardly registers the mild noise it makes as it flies past and lodges into the tiled wall behind him. But the wash of bullets that follows is loud, booming and thudding, clack-clacking with helicopter speed. There is a raft of screams, too, but that noise is short-lived, soon exterminated by the gunfire. Before Luca can zip his pants, lower the lid, climb up to look out, before he has time to verify the source of that terrible clamor, the bathroom door swings open and Mami is there. “Nene, ven,” she says, so quietly that Luca doesn’t hear her. Her hands are not gentle; she propels him toward the shower. He trips on the raised tile step and falls forward onto his hands. Mami lands on top of him and his teeth pierce his lip in the tumble. He tastes blood. One dark droplet makes a tiny circle of red against the bright green shower tile. Mami shoves Luca into the corner. There’s no door on this shower, no curtain. It’s only a corner of his abuela’s bathroom, with a third tiled wall built to suggest a stall. This wall is perhaps five and a half feet in height, three feet in length. Just large enough, with some luck, to shield Luca and his mother from sight. Luca’s back is wedged, his small shoulders touching both walls. His knees are drawn up to his chin, and Mami is clinched around him like a tortoise shell. The door of the bathroom remains open, which worries Luca, though he can’t see it beyond the shield of his mother’s body, behind the half-barricade of his abuela’s shower wall. He’d like to wriggle out and tip that door lightly with his finger. He’d like to swing it shut. He doesn’t know that his mother left it open on purpose. That a closed door only invites closer scrutiny. The clatter of gunfire outside continues, joined by an odor of charcoal and burning meat. Papi is grilling carne asada out there and Luca’s favorite chicken drumsticks. He likes them only a tiny bit blackened. He likes the crispy tang of the skins. His mother pulls her head up long enough to look him in the eye. She puts her hands on both sides of his face and tries to cover his ears. Outside, the gunfire slows. It ceases and then returns in short bursts, mirroring, Luca thinks, the sporadic and wild rhythm of his heart. In between the racket, Luca can still hear the radio, a woman’s voice announcing Mejor FM Acapulco, 100.1! and then Banda MS singing about how happy they are to be in love. Someone shoots the radio, and then there’s laughter. Men’s voices. Two or three, Luca can’t tell. Hard bootsteps on Abuela’s patio. “Is he here?” one of the voices is just outside the window. “Here.” “What about the woman?” “Hey, chicken!” another says. “Man, this looks good. You want some chicken?” Luca’s head is beneath his mami’s chin, her body knotted tightly around him. “Forget the chicken, pendejo. Check the house.” Luca’s mami rocks in her squatting position, pushing Luca even harder into the tiled wall. She squeezes against him, and together they hear the squeak and bang of the back door. Footsteps in the kitchen. The intermittent rattle of bullets in the house. Mami turns her head and notices, vivid against the tile floor, the lone spot of Luca’s blood, illuminated by the slant of light from the window. Luca feels her breath snag in her chest. The house is quiet now. The hallway that ends at the door of this bathroom is carpeted. Mami tugs her shirtsleeve over her hand, and Luca watches in horror as she leans away from him, toward that telltale splatter of blood. She runs her sleeve over it, leaving behind only a faint smear, and then pitches back to him just as the man in the hallway uses the butt of his AK-47 to nudge the door the rest of the way open. There must be three of them because Luca can still hear two voices in the yard. On the other side of the shower wall, the third man unzips his pants and empties his bladder into Abuela’s toilet. Luca does not breathe. Mami does not breathe. Their eyes are closed, their bodies motionless, even their adrenaline is suspended within the calcified will of their stillness. The man hiccups, flushes, washes his hands. He dries them on Abuela’s good yellow towel, the one she only puts out for parties. They don’t move after the man leaves. Even after they hear the squeak and bang, once more, of the kitchen door. They stay there, fixed in their tight knot of arms and legs and knees and chins and clenched eyelids and locked fingers, even after they hear the man join his compatriots outside, after they hear him announce that the house is clear and he’s going to eat some chicken now, because there’s no excuse for letting good barbecue go to waste, not when there are children starving in Syria. The man is still close enough outside the window that Luca can hear the moist, rubbery smacking sounds his mouth makes with the chicken. Luca concentrates on breathing, in and out, without sound. He tells himself that this is just a bad dream, a terrible dream, but one he’s had many times before. He always awakens, heart pounding, and finds himself flooded with relief. It was just a dream. Because these are the modern bogeymen of Guerrero. Because even children whose parents take care not to discuss the violence in front of them, to change the radio station when there’s news of another shooting, to conceal the worst of their own fears, cannot prevent their children from talking to other children. On the swings, at the fútbol pitch, in the boys’ bathroom at school, the gruesome stories gather and swell. These kids, rich, poor, middle class, have all seen bodies in the streets. Casual murder. And they know from talking to one another that there’s an hierarchy of danger, that some families are at greater risk than others. So although Luca never saw the least scrap of evidence of that risk from his parents, even though they demonstrated their courage impeccably before their son, he knew – he knew this day would come.

• American Dirt by Jeanine Cummins is published by Tinder Press in Trade Paperback on 21^st January, £14.99