The Islands (Catapult), a new book of short fiction by Jamaican-descended Canadian Dionne Irving, ranges over continents and decades to tell the restless stories of Jamaican women at home and in the far-flung diaspora. These characters — immigrants from Jamaica or the offspring of immigrants — grapple with practicalities of displacement, self-reinvention, and the finding and making of home, whether in 1950s London or present-day New Jersey.