What is the theme in The Hare with Amber Eyes: A Family's Century of Art and Loss by Edmund de Waal?

One dominant theme that runs through the happiness of "The Hare with Amber Eyes" as well as its sadness, is art and the love of art. Edmund de Waal first set out to discover the history of the netsuke collection that had belonged to his family since the late 1800s. Although most of the male members of the prominent Jewish Ephrussi family usually wound up in the business world, Charles Ephrussi [1849-1905] a distant cousin of Edmund's, was an art lover and high-profile Paris art dealer.