The Downstairs Neighbor by Helen Cooper

An addicting and twisty debut about an apartment building devastated by the disappearance of a teenage girl-and by the secrets that won't be kept behind each closed door-that will thrill fans of Lisa Jewell and Shari Lapena.
One House. Three Families. Countless Secrets.
From her downstairs apartment in suburban London, Emma has often overheard the everyday life of the seemingly perfect family upstairs-Steph, Paul and teenage daughter Freya-but has never got to know them. Until one day, she hears something that seizes her attention: Freya has vanished and the police are questioning Steph and Paul about their life. Do either of you have any enemies? Anyone who might want to harm or threaten you?
The effects of Freya's disappearance ripple outward, affecting not just her parents, but everyone who lives in the building, including Emma and local driving instructor Chris, who was the last person to see the teenager before she went...

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