The Informer by Liam O'Flaherty is an exciting and intense book that perfectly depicts the tumultuous Dublin of the Irish War of Independence. This enduring piece of Irish fiction explores guilt, atonement, and the quest for justice.This stirring book is a story of temptation, betrayal, and retaliation that takes place in the immediate post-Irish Civil War period. Gypo Nolan is portrayed as providing information on a sought comrade.