Errores criminales

There are hidden messages in the chapter titles. In printing errors. In parked car alarms at midnight. Ariadna sees them all. She is a cryptographer, prefers codes to people and has spent her entire life finding what others don't see. But when he arrives at the apartment of a famous scientific communicator and finds her dead on the floor, he has to face the most dangerous enigma he has ever had to decipher. Someone watches her. Someone who knows their movements, hacks traffic lights, manipulates newspapers and communicates through 1980s calculators or newsstand novels. To save lives, and perhaps her own, Ariadna must solve a chain of puzzles that mixes cryptography, steganography and history with the most disturbing technology of the present. But there is one rule: you, the reader, can play too.