Silent Man

A former intelligence officer and CIA operative is forced to confront a Cold War-era case that resurfaces and threatens his family, and the book is structured as a tense, multi-timeline thriller with a ticking-clock element as he tries to protect his wife and daughter.

The plot centers on a case from his past that comes back to haunt him, which is why espionage and conspiracy are also tagged; the book is a slow-burn build rather than a fast-paced action thriller, so atmospheric and dark fit the tone better than gritty or dark-humor.