Peril At End House by Agatha Christie

A celebrated Belgian detective is drawn into a seaside mystery when a vivacious young woman at a cliffside manor survives a string of apparently accidental threats to her life; what begin as near-misses and odd occurrences prompt a careful investigation that teases out tangled relationships, hidden identities and motives, and culminates in a clever ruse that exposes the surprising architect of the peril.

Purchase from Bookshop.org