If you think you wouldn't raise your skirts for a rakish legend about the purifying powers of a unicorn's horn, then maybe you aren't a 15th-century serving girl under the sway of a velvet-tongued court painter of ill repute. In keeping with her bestselling Girl with a Pearl Earring, and its Edwardian-era follow-up, Falling Angels, Tracy Chevalier's tale of artistic creation and late-medieval amours, The Lady and the Unicorn is a subtle study in social power, and the conflicts between love and duty. Nicolas des Innocents has been commissioned by the Parisian nobleman Jean Le Viste to design a series of large tapestries for his great hall (in real life, the famous Lady and the Unicorn cycle, now in Paris's Musee National du Moyen-Age Thermes de Cluny). While Nicolas is measuring the walls, he meets a beautiful girl who turns out to be Jean Le Viste's daughter. Their passion is impossible for their world--so forbidden, given their class differences, that its only avenue of expression turns out to be those magnificent tapestries. The historical evidence on which this story is based is slight enough to allow the full play of Chevalier's imagination in this cleverly woven tale.