Kevin Brook's work primarily delves into the history and genetic genealogy of Jewish communities and related subjects. His extensive research focuses on the Khazars, Ashkenazi and Sephardi Jewry, as well as lesser-known groups like Karaite and Armenian Jews. Brook also explores the history of African-American music and other cultural topics. Through his publications, he contributes to a deeper understanding of complex histories and identities.
This comprehensive and up-to-date guide to the genetic origins of Ashkenazic Jews focuses on their 129 maternal haplogroups and their connections to the Middle East, North Africa, Europe, and East Asia. It definitively shows that all Ashkenazim descend both from the ancient Israelites and from converts to Judaism.