O'Malley's most celebrated writings are "On Another Man's Wound", a memoir of the War of Independence, and "The Singing Flame", an account of his involvement in the Civil War. "Raids and Rallies" includes an account of the period he was required by the IRA Command under Lynch to hide in secret at Sheila Humphreys' house near Ballsbridge. The house was raided on 4 November 1922 during which the Ryan sisters were arrested with O'Malley. They were consigned to internment in Mountjoy Prison. He spent nearly three years inside before being released due to pressure from De Valera. The two volumes were written during O'Malley's time in New York, New Mexico and Mexico City between 1929 and 1932.