Delusional — Book Summary & Review

Detective Michael Bennett and army-sniper-turned-NYPD officer Rob Trilling operate under an ATF-and-evidence framework, and the book keeps testing whether “facts” can survive the group’s insistence that their motives are righteous. Patterson and Born build the plot like a three-rail track: New York City bombings, a military-base burglary for munitions across the river, then Montana arson and violence outside Bozeman. Bennett and Trilling bounce between those locations while the investigation tries to pin the incidents to something measurable—routes, access points, procurement—only for the perpetrators’ explanations to keep sounding like delusion to law enforcement. That tension is the spine of Delusional, and it’s sharper than the standard “angry cult” thriller setup because the group’s claims are always tied to specific actions. Patterson and Born make you feel the procedural grind: interviews that go nowhere, leads that collapse, and the constant question of whether you’re chasing a criminal conspiracy or a worldview that won’t translate.

One concrete example is how the novel treats the perpetrators’ “better world” language as both a psychological weapon and a tactical clue. Another is the Montana sequence, where arson isn’t just atmosphere—it becomes the investigators’ attempt to reconstruct a chain of responsibility that keeps slipping out of reach. If you’re expecting a neat, single explanation by the end, the book will frustrate you; it doesn’t fully reward readers who want airtight answers for every motivation. It also won’t satisfy anyone who needs lyrical character work, because the focus stays on Bennett, Trilling, and the case’s moving parts rather than deep interiority.