El Libro Negro de las Horas

Ex-inspector Unai López de Ayala, known as Kraken, receives an anonymous call that shatters his understanding of his family's past. He has one week to locate the legendary Black Book of Hours, a rare bibliographical treasure, or his mother, long deceased, will die. This impossible ultimatum sends Kraken on a desperate hunt between Vitoria and Madrid, forcing him to confront a criminal mastermind capable of altering history itself.