After writing three thrillers starring a squad boy, Javier Cercas (Ibahernando, 1962) offers a unique variation in his new book, in which the detective is the author himself and the person under investigation is none other than Pope Francis. God's Fool at the End of the World –published by Random House Literature, after a period of the author in Planeta that began with Terra Alta (2019) – explains the writer's trip to Mongolia as part of the courtship of the supreme pontiff with the aim of constructing an in-depth portrait. "I have had the privilege of being the first writer to whom the Vatican has opened its doors to write a book," he says. "When they made the proposal to me, I immediately said to them: 'Don't you know that I am a dangerous guy?' But they didn't back down either. In fact, I have had absolute freedom to write whatever I wanted. Not even what I wanted. Not even. if it is read by the Vatican, they don't decide to excommunicate me."