American Dirt by Jeanine Cummins
Lydia Perez and her young son, Luca, are at a family cookout when gunfire erupts. Her husband is a reporter targeted for his work exposing members of a powerful Mexican cartel and while she and Luca hide in the shower, all other family members are murdered. After the massacre, Lydia realizes she is not safe and the two head “norte”, hoping to hide and start a new life in the United States.