Michael Gregorio was the husband and wife writing team of Michael G. Jacob and Daniela De Gregorio. They lived in Spoleto, Italy. Michael taught English and the History of Photography and Daniela teaches Philosophy. They are the creators of:
1. 'Hanno Stiffeniis', a magistrate in French-occupied Prussia.
2. 'Sebastiano Cangio', a park ranger in the Sybilline Mountains National Park in central Italy.