* Leizar: A Struggle Across Generations* by David Gelernter; independently published © 2021; ISBN 9781399-912051; 430 pages including cast of characters and glossary, $18.99. SAN DIEGO – This is a novel that traces a Jewish family through several generations from a shtetl in Poland to the big city of Warsaw, and later onward to Scotland, Germany, and England over the course of pogroms and two world wars. It is marred in the telling by a series of errors that might have been eliminated through more careful research or fact checking. I point out the more obvious ones in the hope that they will b…