* History of Peace
* The Muslim Revival in India
* Michael Oakeshott: An Introduction
* For Democracy: The History of the Conservative Party
* Gladstone and the Construction of Victorian Liberal Politics
* The Making of the Modern Conservative Party
* Charlie M: The Last Cavalier
* From Castlereagh to Gladstone
* The Great Rebellion
* The Stuart Restoration and After
* The Struggle for Supremacy
* The Glorious Revolution and Aftermath
* The Making and Breaking of the Anglo-Irish Treaty
* The Victorians and their World
* The Early Wars of the Reformation: Volume I: Origins of Conflict
* The Early Wars of the Reformation: Volume II: Princes, People and Politics
Novels:
* Death of an Honourable Man
* Murder Most Royal
* The Declared and Undecared