- *The Medici: Godfathers of the Renaissance* (2006)
- *A Brief History of Secret Societies* (2007)
- *Sex and the City*: A Cosmological Approach (2008)
- *In the Name of God: The Role of Religion in the Modern World* (2010)
- *The Prince* by Niccolò Machiavelli (2012, translation and commentary)
- *Art Deco: The History and Influence of the Decorative Style* (2013)
- *The Birth of Europe: A History of the Continent before Christianity* (2014)
- *The Birth of the Modern World: A History of the Last Two Thousand Years* (2016)
- *The Medici: Power, Money, and Art in Renaissance Florence* (2017)
Articles and Essays
- "The Medici and the Renaissance" (2003)
- "Secret Societies and the Power of Ritual" (2005)
- "Sex and the City: A Cosmological Approach" (2006)
- "In the Name of God: The Role of Religion in the Modern World" (2008)
- "The Prince by Niccolò Machiavelli: A Translation and Commentary" (2010)
- "Art Deco: The History and Influence of the Decorative Style" (2011)
- "The Birth of Europe: A History of the Continent before Christianity" (2012)
- "The Birth of the Modern World: A History of the Last Two Thousand Years" (2014)
- "The Medici: Power, Money, and Art in Renaissance Florence" (2015)
Other Works
- Contributor to the Italian Enciclopedia Treccani
- Guest speaker at the University of Florence, the University of Siena, and the University of Bologna
- Curator of the exhibition "The Medici: Godfathers of the Renaissance" at the Palazzo Medici Riccardi in Florence (2006)