The Madness — Ian McEwan

The Madness is a dark psychological thriller that follows Peter Lawson, a respected mental health analyst whose idyllic life shatters in a single, devastating moment-the loss of his daughter in a tragic hit-and-run. Consumed by grief and disillusioned by the system's failures, Peter begins a descent into obsession, madness, and vigilante justice. As he spirals deeper, haunted by a voice that may be his own fractured mind-or something else-Peter turns the skills he once used to heal into tools of destruction. But in chasing the man who stole his world, Peter risks becoming something far worse than the killer he hunts.