Cristina de Middel's work combines documentary and conceptual photography to depict the perilous journey of Mexican migrants traveling to California. As the first Spanish head of Magnum Photos, de Middel travels with migrants on "the beast" train, interviewing various stakeholders like sicarios, coyotes, and police officers. The narrative, infused with de Middel's photography, objects from the desert, and archival footage, highlights the dangers of migration from Tapachula, Mexico, to Felicity, California. Featuring migrant testimonies and de Middel's commentary, the book also includes an afterword by journalist Pedro Anza on U.S. border policies and their human impact.