Girl in the moonlight [a novel]

"Since he was a shy, protected young man, Wylie Rose has been drawn to the alluring, unconventional Bonet siblings, the children of a Bohemian Spanish painter and an American heiress. And especially the enchanting Cesca, a girl of shimmering, incandescent beauty with a wild, irrepressible spirit. Spanning several decades and moving through the worlds of high society and art, Girl in the Moonlight takes us from the wooded cottages of the Hamptons...