I’ve never liked jigsaw puzzles. The irregular curves and edges of each piece all look the same, and trying to discover which piece connects to another is a challenge I am not disciplined enough to do. However, Julian Borger’s "I Seek A Kind Person" makes trying something intricate worthwhile. Julian takes on the interlocking and absorbing task of finding, not only his own relatives, but also seven others who — as children — were dispatched to families outside of Austria in 1938. Ads or “adverts” in the Manchester Guardian (in Manchester, UK) materialized because desperate Jewish parents in Vienna tried...