Guerrilla Days in Ireland is a book published by Irish Republican Army leader Tom Barry in 1949. The book describes the actions of Barry's Third West Cork Brigade during the Anglo-Irish War, such as the ambushes at Kilmichael and Crossbarry, as well as numerous other less known attacks made by the Brigade against the British Army, Black and Tans, Auxiliary Division and the Royal Irish Constabulary. The text was originally serialised in The Irish Press in 1948 before being published as a book.