Kaleidoscope — Danielle Steel

The World War II love affair between lovely Frenchwoman Solange Bertrand and American GI-turned-actor Sam Walker burned too brightly and ended in tragedy, leaving their three young daughters orphaned. Hilary, the oldest (and the only one who remembers her sisters), foregoes building a personal life, especially when her efforts to locate her sisters hit a dead end. But when high-priced private investigator John Chapman is hired to reunite the three sisters, the secrets and lies that kept the women apart--and bound them together--are revealed and the love only sisters can share blossoms again.