"Clara and Mr. Tiffany," by Susan Vreeland (Random House, 432 pp.) Vreeland, author of “Luncheon of the Boating Party,” once again builds a novel around the life of a famous artist and a major piece of art. This time her story, set in New York’s Gilded Age, imagines the Tiffany leaded-glass lamp as the creation of Clara Driscoll, the studio manager of Louis Tiffany Comfort. (January)