Perhaps reflecting its more controversial theme in Ireland, "The Singing Flame" was not published until 1978, well after O'Malley's death. He also wrote another book on the revolutionary period, "Raids and Rallies", describing his and other fighters' experiences. This book was based on a lengthy series of interviews he had conducted in the 1950s with former IRA men and ran as a highly popular serial in "The Sunday Press" from 1955-56. In addition, O'Malley wrote large volumes of poetry and contributed to a literary and cultural magazine "The Bell", set up by his fellow republican Peadar O'Donnell.