<p>Anna Katharine Green's 'A Difficult Problem' presents the reader with an elegantly wrought narrative, nestled within the early 20th-century crime fiction tradition. The novel showcases Green's penchant for intricate plotting and psychological depth, features that have earmarked her as one of the earliest pioneers of the detective genre. Her prose, befitting the period's literary style, offers a meticulous yet gripping exploration of both crime...