| Ancient Rome: A Military and Political History |
| Hardcover, 395 pp. Cambridge University Press, 2005 ISBN: 978-0521809184 Paperback edition, 2007 |
| Malleus Maleficarum: Latin Text and English Translation |
| Hardcover, 2 vols, 720 + 615 pp. Cambridge University Press, 2006 ISBN: 978-0521859776 |
| Αρχαία Ρώμη: Στρατιωτική και Πολιτική Ιστορία (Ancient Rome in Modern Greek, translation by Doukaina Zanne) |
| Hardcover, 540 pp. Athens: Εκδόσεις Παπαδήμα, 2007 ISBN : 960-206-569-9; 540 pages |
| Narrative of the Anabaptist Madness (Translation of Hermann von Kerssenbrock's Latin history of the 1534-1535 Anabaptist takeover and kingdom of Münster) |
| Hardcover, 864 pp. Studies in the History of Christian Tradition (ed. Robert J. Bast), vol 132 Leiden: Brill, 2007 ISBN: 978-9004157217 |
| The Hammer of Witches: A Complete Translation of the Malleus Maleficarum |
| Paperback, 650 pp. Cambridge University Press, 2009 ISBN: 978-0521747875 |
| Breakdown of the Roman Republic: From Oligarchy to Empire |
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Hardback, 450 pp. Cambridge University Press, 2009 ISBN: 978-0521518192 |
| Starożytny Rzym: Historia wojskowa i polityczna (Ancient Rome in Polish, translation by Włodzimierz Gałąska, Leszek Otrębski and Marcin Stopa) |
| Paperback, 512 pp. Ksiażka i Wiedza, 2009 ISBN: 978-83-05-13566-5 |
| La declive de la república romana: de l'oligarquía al imperio (Breakdown of the Republic in Spanish, translation by Ana Herrera Ferrer) |
| Paperback, 506 pp. Editorial Ariel, 2011 ISBN: 978-84-344-6954-9 |
| Translator and Adaptor of Michel Launey, An Introduction to Classical Nahuatl |
| Hard and paperback, 285 pp. Cambridge Univ. Press, 2011 ISBN: 978-0521732291 |
| Breakdown of the Roman Republic: From Oligarchy to Empire |
| Paperback, 450 pp. Second Revised edition, 2012 ISBN: 978-1107657021 ISBN: 978-0521732291 |