Kit Philipson has always felt like stranger in his family. An only child in Glasgow, Scotland, his mother was a teacher; his father, a journalist, escaped from Nazi Germany at the age of three on one of the 1939 Kindertransports. On her deathbed, Kit's mother tells him he was adopted and his birth name was Novello. A search of old newspaper files reveals that a three-year-old boy named Peter Novello was abducted from his parents' holiday hotel in...