A crime series based on the bestseller *The Black Book of Hours* by Eva García Sáenz de Urturi. Kraken receives a mysterious phone call ordering him to track down a rare, valuable book; if he fails, his mother will be killed. The problem, however, is that his mother has been dead for decades. Together with his inseparable partner Esti, he must solve a complex case filled with suspense, action, and emotion.
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