A woman hiding from her old life in a remote cabin finds a blood-covered girl with a knife outside her window during a violent storm.

The Intruder is a psychological thriller with domestic and survival-thriller elements, published in October 2025. Its central concern is the instability of trust: how quickly vulnerability can become threat, and how trauma can distort the judgments we make about other people. The present-day cabin narrative alternates with an earlier story involving an isolated girl and her abusive mother, creating two lines of suspense that gradually begin to press against each other.

McFadden is strongest when she controls information. The short chapters and shifting perspectives create a steady sequence of reversals, while the storm gives the present-day sections a useful physical deadline. The tension is not especially subtle, but it is efficiently managed. Each revelation alters the reader's understanding without completely emptying the story of suspense. Contemporary criticism has particularly praised the pacing and the way the novel builds its twists through alternating perspectives.

The reservation is credibility. Some turns depend on characters behaving with a convenience that the suspense occasionally exposes, and the final explanations are tidier than the preceding uncertainty deserves. The novel also repeats certain clues more heavily than necessary.

Still, the machinery works. This is not an elegant thriller, nor does it need to be. It understands that momentum is a form of craft and rarely allows the reader enough distance to become bored.

A brisk, effective psychological thriller that earns most of its shocks and overstretches a few of them.