At sixty-five, Aníbal believed he had no surprises left. A lifelong engineer and cybersecurity expert, he'd learned to read danger in systems long before he learned to read it in people. But no certification prepared him for this: his pension keeps shrinking, his daughter is about to start university, and the money he needs to give her that chance simply doesn't exist.

To reinvent himself, he does the only thing he knows how to do: apply an engineer's logic to a human problem. He writes a book ? a plain-language cybersecurity guide for everyday readers ? and self-publishes it with the help of artificial intelligence. It's his rescue plan. His last well-engineered project.

Then the phone rings. An unknown number, the same pattern of silence he recognizes from another night, months ago. And Aníbal, who has spent his whole life closing backdoors and hardening other people's systems, discovers that the most dangerous vulnerability was never in the code.

Access Denied is a novel about late-life dignity, the bond between a father and a daughter, and that age when a man believes he's seen it all ? until life proves him wrong. A story with the pulse of a thriller and the heart of an intimate character study.