M: Maxwell Knight, MI5's Greatest Spymaster

How the Irish Saved Civilization: The Untold Story of Ireland's Heroic Role from the Fall of Rome to the Rise of Medieval Europe

Agent M: The Lives and Spies of MI5's Maxwell Knight

Say Nothing: A True Story of Murder and Memory in Northern Ireland

Our Man in New York: The British Plot to Bring America into the Second World War

Charlie One: The Story of an Irishman in the British Army and His Role in Covert Counter-Terrorism Operations

The Glorious Heresies: 'A big, brassy, sexy beast of a book' IRISH TIMES

Red Sky in Morning: author of the 2023 Booker Prize-Winning novel Prophet Song

The Crooked Branch

The Outside Boy

The Padre: The True Story of the Irish Priest who Armed the IRA with Gaddafi's Money

The History of Ireland

Secret Child

The Scandalous Lady W

The Strangers' House: Writing Northern Ireland

History of Britain and Ireland: The Definitive Guide

We Don't Know Ourselves: A Personal History of Ireland Since 1958

The Sorrow and the Loss: The Tragic Shadow Cast by the Troubles on the Lives of Women

The Northern Ireland Conflict