Sarah's Key, by Tatiana de Rosnay

Sarah's Key is a novel by Tatiana de Rosnay, first published in its French translation as Elle s'appelait Sarah in September 2006. Two main parallel plots are followed through the book. The first is that of ten-year-old Sarah Starzynski, a Jewish girl born in Paris, arrested with her parents during the Vel' d'Hiv Roundup.  Before they go, she locks her four-year-old brother in a cupboard, thinking the family should be back in a few hours. The second plot follows Julia Jarmond, an American journalist living in Paris, who is asked to write an article in honor of the roundup's 60th anniversary.