A Brazilian Review · In Full · Translated into English

Part of what makes us human is our persistent need to understand things that refuse to be understood. Schizophrenia is one of those things. It has resisted explanation for as long as medicine has had a name for it. What Consuelo Walss-Bass has done, in this quiet and devastating book, is refuse to accept that resistance as an answer.

Why My Sister? arrives as one of those rare books that cannot be easily classified. It is memory and it is science. It is confession and investigation. It is, above all, a question that hurts.

Consuelo Walss-Bass, known all her life as Chelo, grew up in Torreón, in northern Mexico, in a family marked by a presence no one knew how to name. Her mother, Eugenia, was beautiful, religious, unstable, and frightening. Her father, Rodolfo, was a physician, ambitious, contradictory, and absent in the way certain men are absent even when they are standing in the same room. Five children grew up in that environment of fractured affection, learning early that survival required silence, shrewdness, and the ability to leave the scene at the right moment.

Chelo was the quiet one. While her older sister Jenny excelled at everything she touched and her brother Rudy disappeared into the streets, she stayed in the library. She observed. She accumulated questions. And she carried, without yet having words for it, the intuition that something very serious was about to happen to the youngest sister, Paty, born on a November night in 1974.

The question of the title is not rhetorical. It is the question that structures an entire life. Why Paty, and not her? Why did schizophrenia choose that specific sister, in a family where so many other risk factors were present for everyone? Science, Chelo explains with the authority of someone who has spent decades in neurogenetics, does not answer with names. It answers with probabilities, with combinations of genetic variants, with the statistical cruelty of knowing that environment and DNA conspire together against certain people from before birth.

What makes this book truly extraordinary is Chelo's refusal to separate the scientist from the sister. In every chapter that recounts the turbulent childhood in Torreón, the hospitalizations of Eugenia, the slow unraveling of Paty in adulthood, the crises that erupted in San Antonio, she weaves in rigorous explanations of epigenetics, early stress, antipsychotic pharmacology, and the still-immense limits of what medicine knows about this disease. It is not a narrative device. It is a form of intellectual honesty. It is Chelo saying: I needed to understand in order to survive.

The writing has the restraint of someone who learned from childhood not to draw attention to herself, and it is precisely that restraint that makes certain scenes unbearably beautiful. The mother leaving at dawn with the baby in her arms without saying where she is going. The sister sitting motionless on the bed in her new school uniform, refusing to lie down so as not to wrinkle it. Paty as an adult, already in full psychosis, her face distorted into an expression Chelo had never seen on her before.

For readers across Latin America, there is an additional dimension to this book. The Walss-Bass family lived between Mexico and the United States carrying everything that Latin Americans carry when they cross that border: the stigma of difference, the shame of mental illness, religiosity as both shield and trap, and the ancient difficulty of asking for help when raised to believe that family problems stay inside the house.

The sad truth, however, is that medicine still cannot say why Paty and not Chelo. Only the passage of time will reveal the distance between our current ideas of causation and the concrete reality. What this book offers is not easy consolation, nor a tidy redemption. It offers something more valuable: the honest company of someone who also does not know the answer, but decided it was worth spending an entire life asking the right questions.