Donna Jo Napoli was introduced to Dutton by fellow Philadelphia area resident Lloyd Alexander. Dutton promptly published her first middle grade novel, Soccer Shock, in 1991 to critical and popular acclaim.

In 1993, Napoli's versatility became evident with the publication of The Prince of the Pond (1992) which won the New Jersey Reading Association's M. Jerry Weiss Book Award in 1997 and The Magic Circle (1993). The former, a light fantasy that revisits the frog prince motif, highlights her talent for humor. The latter, a young adult novel, also revisits a fairy tale ("Hansel and Gretel," in this case), but there the similarities to her humorous books end. In this dark tale told from the point of view of the witch, Napoli tells a tale of outward corruption and inner purity, filled with spellbinding imagery. School Library Journal said, "The strength of Napoli's writing and the clarity of her vision make this story fresh and absorbing. A brilliantly executed novel that is sure to be appreciated by thoughtful readers."

Perhaps Napoli's versatility can be explained in part by her background in linguistics and poetry. She is currently a professor of linguistics and chair of the linguistics program at Swarthmore College, where she also teaches courses in writing fiction for children. In addition to writing for children, she is a published poet and coeditor of four poetry volumes.

Donna Jo Napoli is the author of many books, including Soccer Schock(1991), The Prince of the Pond (1992), The Magic Circle (1993), When Water Closes Over My Head (1994), Shark Shock (1994), Jimmy, The Pickpocket of the Palace -- the highspirited sequel to The Prince of the Pond, The Bravest Thing (1997), On Guard (1997), Changing Tunes (1998), and also the award-winning novel Zel (1996), a Bulletin Blue Ribbon, School Library Journal Best Book of the Year, and a Publishers Weekly Choice of the Years Best books. Donna Jo Napoli's Stones in Water(1997),is the wrenching novel of a boy caught in a war he hates. It won the Golden Kite Award in 1997.

Donna Jo Napoli lives in Swarthmore, Pennsylvania, with her husband Barry and their five children. She has received three degrees from Harvard University: a B.A. in Mathematics, an M.A. in Italian Literature, and a Ph.D. in General and Romance Linguistics. She has taught on the university level since 1970, is widely published in scholarly journals and has received numerous grants and fellowships in the area of linguistics.

Hers is the most famous portrait in the world. Here, in prose as rich as the high Renaissance, is Mona Lisa’s tale—a story of passion, intrigue, loss, and, most of all, love. Elisabetta longs for romance, though she thinks she is too plain. Then, on a fateful visit to glittering Florence, she catches the eye of the great Leonardo da Vinci, and falls for a boy named Giuliano de’ Medici. It is a dangerous time to be—or be involved with—a Medici. As tragedy and chaos threaten their happiness, Elisabetta faces the bittersweet truth of love.