New York: Atheneum / Aladdin, (1975). SIGNED - A book for older children and young adults which speculates on why Leonard da Vinci chose to paint a portrait of the second wife of an unimportant Florentine merchant, when the rich and famous were clamoring for portraits by him - a portrait now known as Mona Lisa. INSCRIBED by the author on the half title page "from the first Mrs, Konigsburg, Elaine" and dated in 1980. Frontispiece of Mona Lisa. 138 pp plus 7 pp of reproductions of other da Vinci works.

New York: Free Press / Simon & Schuster, (2012). First edition - The famous image of Vitruvian Man by Leonardo da Vinci is examined, along with da Vinci's life and times. Illustrated. Notes, works cited, xv, 263 pp.

New York: The Free Press, 1998. dj. Hardcover - The story of the mysterious friendship between Leonardo da Vinci and Niccolo Machiavelli that changed history and almost accomplished one of the most ambitious plans of the city-state of Florence (Leonardo's concept to build a system of canals that would make the Arno River navigable from Florence to the sea, a project begun in 1504.). Roger Masters, a distinguished historical scholar, reconstructs this project and its failure, fills in many details of the relationship between the two giants of the Renaissance, and raises tantalizing questions on how history might have taken a different course had the project succeeded. Masters's reconstruction is both fascinating and plausible. Illustrated. Extensive notes, sources, index. 278 pages. ISBN: 0-684-844524.

New York: Doubleday, (2002.) dj. Hardcover first edition - The author's first novel - a romantic story of time travel between modern New York City and 15th century Tuscany, a story "rooted in art history, music theory and the rudiments of physics." 307 pp. ISBN: 0-385503199.