Diane received a BA from Villanova University, The Honors Program in Liberal Arts. She later earned a certificate from The Art Institute of Philadelphia. As assistant to the director at the Solomon R. Guggenheim Museum in the 1990s and then the National Academy (also in New York), she solidified her interest in the arts with a certificate from New York University School of Appraisal Studies. She is the founder of an art appraisal business, The Realization of Art, and is certified in contemporary art. Throughout, she wrote freelance, contributing to Shared Space, a monograph of the Joseph Cohen art collection and to Artes magazine. Dewey graduated with a Master of Science in Mental Health Counseling from Capella University in 2015, after which she began working in the field of adoption counseling. She has since returned to writing full time; Fixing the Fates is her first book.