*The No.1 New York Times and Sunday Times bestseller*

Discover the electric new thriller from the No.1, million-copy bestseller, Lucy Foley

There was a murder here last night.
Who holds the key to the mystery of apartment three?
'Dazzling' The Times
'Up-all-night reading' Erin Kelly
'Gloriously twisty' Ruth Ware
'Combines edge-of-your-seat tension with out-and-out Parisian chic' Adele Parks

In a beautiful old apartment block, deep in the backstreets of Paris, secrets are stirring behind every resident's door.

The lonely wife
The party animal
The curtain-twitcher
The secret lover
The watchful caretaker
The unwanted guest

One resident is missing. Only the killer holds the key to the mystery...