
Part One opens and closes with Paddy, a man described as the life of the party, the kind of person who lights up a room the moment he walks in. Naturally, that means he ends up brutally murdered (pushed under a train). At this point I’m convinced being universally loved in thrillers is basically a death sentence.
By Part Two I was already hooked. The pacing pulls you in quickly, and the rotating perspectives kept the tension building. We follow Ash and her mother Nina in the aftermath of Paddy’s death, while chapters from the past slowly unravel the truth about the man moving into their lives.
Ash’s insecurity about being 26 and still living at home hit a little too close to home for me. That whole feeling of “falling backward” while everyone else seems to be moving forward is painfully relatable, and it made her perspective feel very grounded.
Nina moving on with Nick so soon after Paddy’s death definitely raised some alarms. But at the same time, seeing Ash notice that the “light” had returned to her mother’s eyes made the situation complicated. Shared grief can create strong bonds between people; though in this case, Nick’s claim that he had lost someone too felt suspicious from the beginning.
The structure alternates between Nina/Ash in the present and chapters from Martha, one of Nick’s previous wives. I liked the way the story slowly pieced together his past through these perspectives, though there were moments where I had to pause and keep track of which identity he was operating under.
And there were a LOT of identities.
Nick — also known as Simon, Al, and several other names — had a whole trail of destruction behind him: a first wife Amanda and two sons, then Tara, Laura, and Martha, each relationship ending with manipulation, financial ruin, or worse. Watching the layers of his lies unravel was honestly one of the most satisfying parts of the book.
Some plot elements stretched my suspension of disbelief a bit. The explanation behind Paddy’s murder — the “Silver Man” telling someone to push him onto the tracks — felt a little convenient, especially when the police seemed willing to dismiss it so quickly. Law enforcement overlooking the many red flags surrounding Nick also became a bit frustrating.
Still, the tension of watching his carefully constructed life start to collapse was compelling.
By the end, Nick’s web of lies finally catches up to him. Personally, I would have loved a more concrete sense of justice. Knowing he was about to be arrested didn’t feel entirely satisfying to me. This is a man who had slipped through consequences his entire life, so l kept waiting for one last twist where he somehow escaped again.
Overall, Don’t Let Him In was a really engaging thriller with a strong central antagonist and an addictive structure. Even when a few plot points felt unlikely, the steady unraveling of Nick’s past kept me turning the pages.
Final Rating: 3.5 stars, rounded up to 4.


















