The Second Mrs. Giaconda — E.L. Konigsburg

Why did Leonardo da Vinci lavish three years on painting the second wife of an unimportant merchant when all the nobles of Europe were begging for a portrait by his hand? In E. L. Konigsburg's intriguing novel, the answer lies with the complex relationship between the genius, his morally questionable young apprentice, and a young duchess whose plain features belie the sensitivity of her soul.