In December 2021, it was reported that the Kunstmuseum Bern would part ways with 29 artworks bequeathed to the Swiss museum by the son of a notorious dealer of Nazi-looted art, and return them to the heirs of two German Jewish collectors. This is the latest in a series of high-profile restitutions of Jewish-owned artworks stolen by the Nazis. Thanks to films such as The Monuments Men and Woman in Gold, these stories are well known; the story of how Jews came to have these collections of art in the first place is much less so. Charles Dellheim’s new book,...