| Denmark, 1513-1660: the rise and decline of a Renaissance monarchy PD Lockhart Oxford University Press, USA, 2007 | 108 | 2007 |
| Sweden in the seventeenth century P Lockhart Bloomsbury Publishing, 2017 | 86 | 2017 |
| Frederik II and the Protestant cause: Denmark's role in the Wars of Religion, 1559-1596 PD Lockhart Brill, 2004 | 82 | 2004 |
| The Drillmaster of Valley Forge: The Baron de Steuben and the Making of the American Army PD Lockhart Smithsonian Books, 2008 | 79 | 2008 |
| Denmark in the Thirty Years' War, 1618-1648: King Christian IV and the decline of the Oldenburg state PD Lockhart Susquehanna Univ. Press, 1996 | 67 | 1996 |
| Religion and Princely Liberties: Denmark's Intervention in the Thirty Years War, 1618–1625 PD Lockhart The International History Review 17 (1), 1-22, 1995 | 19 | 1995 |
| Denmark and the Empire: A Reassessment of Danish Foreign Policy under King Christian IV PD Lockhart Scandinavian Studies 64 (3), 390-416, 1992 | 19 | 1992 |
| The Whites of Their Eyes: Bunker Hill, the First American Army, and the Emergence of George Washington PD Lockhart Harper, 2011 | 18 | 2011 |
| Political Language and Wartime Propaganda in Denmark, 1625–1629 PD Lockhart European History Quarterly 31 (1), 5-42, 2001 | 6 | 2001 |
| Firepower: How Weapons Shaped Warfare P Lockhart Hachette UK, 2021 | 4 | 2021 |
| Steuben comes to America PD Lockhart Military History Quarterly 22 (2), 26, 2010 | 3 | 2010 |
| Dansk Propaganda under Kejserkrigen, 1625-1629 (Danish) PD Lockhart Historie, 222, 1998 | 3 | 1998 |
| The Confederate Naval Squadron at Charleston and the Failure of Naval Harbor Defense PD Lockhart American Neptune 44 (4), 257, 1984 | 3 | 1984 |
| The Rich Legacy of a Forgotten Founder PD Lockhart US News and World Report 145 (1), 45, 2008 | 1 | 2008 |
| The Swedish ‘Absolutist’State, 1679–97 PD Lockhart, PD Lockhart Sweden in the Seventeenth Century, 123-144, 2004 | 1 | 2004 |
| Danish Interwar Politics and the Defence Law of 1937 PD Lockhart War & Society 7 (1), 54-70, 1989 | 1 | 1989 |
| The Rise of the Military Entrepreneur: War, Diplomacy, and Knowledge in Habsburg Europe By Suzanne Sutherland. Ithaca: Cornell University Press, 2022. Pp. xii+ 264. Cloth $44 … PD Lockhart Central European History 57 (2), 262-264, 2024 | | 2024 |
| Envisioning the Christian Society: Niels Hemmingsen (1513–1600) and the Ordering of Sixteenth-Century Denmark. By Mattias Skat Sommer. Spätmittelalter, Humanismus, Reformation … PD Lockhart Church History 91 (4), 926-928, 2022 | | 2022 |
| Northern European Reformations: Transnational Perspectives. James E. Kelly, Henning Laugerud, and Salvador Ryan, eds. London: Palgrave Macmillan, 2020. xvii+ 420 pp.€ 114.39. PD Lockhart Renaissance Quarterly 75 (2), 697-699, 2022 | | 2022 |
| The Armies of Philip IV of Spain 1621-1665: The Fight for European Supremacy PD Lockhart The sixteenth century journal 53 (2), 540-542, 2022 | | 2022 |
