Who Poisoned the Little Bishop?

A bishop is murdered in a retreat house, on the Atlantic coast of Buenos Aires, Argentina. A clever detective initiates an investigation into the habits of some peculiar characters. The novel starts with an email to Pope Francis which contains a detailed and crude report of the circumstances of the crime. Francis asks and receives a sincere, almost brutal description of the lives of some priests who turn up as suspects. Of course, any similarity is mere coincidence.