"The Observations" is a hugely assured and darkly funny debut set in nineteenth-century Scotland. Bessy Buckley, the novel's heroine, is a cynical, wide-eyed, and tender fifteen-year-old Irish girl who takes a job as a maid in a once-grand country house outside Edinburgh, where all is not as it seems. Asked by her employer, the beautiful Arabella, to keep a journal of her most intimate thoughts, Bessy soon makes a troubling discovery and realizes...