Rosamund Lupton writes psychological suspense built around family relationships, missing people and narrators trying to understand events under extreme emotional pressure. Sister begins when Beatrice returns to London after her younger sister Tess disappears and refuses to accept the official explanation of what happened. The novel combines investigation with grief and a deeply personal first-person voice. Afterwards centres on a school fire and follows a mother trying to discover who caused it while her daughter lies injured, using an unusual narrative perspective to widen the mystery. Three Hours compresses a school siege into a tightly controlled timeframe, moving among pupils, teachers, parents and police as events unfold. Lupton's books are character-led but structured around strong suspense premises. Sister is the clearest introduction to her blend of family emotion and investigation, while Three Hours is faster and more procedural in its handling of a crisis. Read more Less