『The Girl on the Train』要約

Paula Hawkins’s bestselling psychological thriller "The Girl on the Train" is narrated by Rachel Watson, a divorced alcoholic who rides the same commuter train into London twice daily. From the carriage, she watches the houses backing onto the tracks, particularly a couple she idealizes as “Jess and Jason”—actually Megan and Scott Hipwell—who live a few doors from Rachel’s old home, where her ex-husband Tom now lives with his new wife Anna. Rachel’s voyeuristic fantasy collapses when Megan vanishes, and Rachel inserts herself into the investigation despite her blackouts and unreliable memory. The novel is told through three alternating first-person narrators—Rachel, Megan, and Anna—each with a distinct voice and limited, often self-serving perspective. Hawkins structures the book around dated diary-style entries that shift between these women, with Rachel’s chapters frequently framed by her drinking and gaps in memory, so the reader cannot fully trust her account. This triangulation of unreliable narration is the book’s signature device, deliberately echoing the domestic suspense tradition while keeping a gritty, ordinary suburban-commuter setting rather than a glamorous one. Megan’s chapters, set before her disappearance, reveal her own secrets and dissatisfaction, while Anna’s sections show the second wife’s resentment of Rachel’s stalking and phone calls. The plot hinges on Rachel’s attempts to reconstruct a crucial night she cannot remember, her fixation on Megan, and the gradual revelation that appearances—both the “perfect” couple she spies on and her own past—are deceptive. Themes include memory and self-deception, addiction, obsession, domestic violence, and the way women are judged. Published in 2015, the novel became a global bestseller and was adapted into a 2016 film starring Emily Blunt, and it is often credited with revitalizing the “girl” titled domestic thriller trend.