Dragon's Teeth
Upton Sinclair, Jr.
 In the first volume of the series, Lanny Budd had met a family of Dutch Jews. By the time the events of this book occur, his half-sister has married one of their sons. In the climax at the end of this volume, Lanny helps spring the other son from Nazi arrest and jail, and gets caught up in the Blood Purge from June 30 to July 2, 1934 in Germany.