The Story

Gwen needed a fresh start. After a rough breakup, the cozy top-floor apartment seemed like a sign. It's peaceful, quiet, and has great light. The only catch is her downstairs neighbor, Alastair. He's oddly helpful from day one—fixing her leaky faucet, bringing up homemade bread, always available for a chat. He's the perfect neighbor. But then, strange things start happening. Gwen gets the promotion she desperately wanted right after venting to Alastair about her awful boss. The ex who broke her heart has a sudden, public change of heart. Every problem she whispers about seems to get solved, almost like magic.

The catch? There's always a subtle, unasked-for favor in return. Watering his plants while he's 'away.' Delivering a sealed envelope to a stranger. Small things that feel wrong. As Gwen digs into Alastair's past and the history of her building, she uncovers a pattern of tenants who got everything they ever desired, only to vanish without a trace. The central question becomes: Is Alastair a guardian angel or a predator, and has Gwen already agreed to a price she doesn't yet understand?

Why You Should Read It

This book got under my skin. Costello is a master at building dread from everyday situations. The horror here isn't in jump scares; it's in the slow erosion of trust in your own judgment. Gwen is a relatable character—flawed, wanting to believe the best in people, which makes her vulnerability so real. You feel her internal battle: the gratitude for the help warring with the deep, primal fear that something is very off.

The real strength is Alastair. He's never a cartoon villain. He's charming, reasonable, and that makes him utterly terrifying. The book plays with the idea of evil as a transaction, asking how far we'd go for our dreams and what we'd justify along the way. It made me look at my own neighbors a little differently!

Final Verdict

If you love a story where the suspense comes from psychological tension rather than violence, this is your next read. It's for fans of slow-burn, character-driven thrillers like the early works of Stephen King or Paul Tremblay, where the setting (a normal apartment building) becomes a character itself. It's also a great pick for anyone who enjoys a modern, smart twist on the classic 'deal with the devil' folktale. Just maybe don't read it right before you have to go talk to your own neighbors.