The following book review was written by Bobbi King:
Endogamy is “marriage within a specific group as required by custom or law” as defined by the Merriam-Webster dictionary.
Mr. Pickholtz writes that European Jews, for generations, married within their own tribes leaving behind a limited genetic pool among the descendants. Members of a tribe today are all related to one another multiple times, creating endogamy, and a situation of research difficulty for the Jewish genealogist.
Endogamy is the account of Mr. Pickholtz’s DNA research of his family. He is of Jewish roots, and notes that he hasn’t seen anything written about the genetic genealogy of Jews. So he wrote this book as his “How I Did It” chronology and hopes to guide along others with similar “closed family” relationships.