The Thirteenth Tribe by Arthur Koestler [FULL AUDIOBOOK]

This book discusses the Khazar Empire, a Turkic kingdom that existed in Eastern Europe between the 7th-11th centuries. At its height, the Khazarian Empire played a significant role in shaping medieval Europe by blocking the Arab conquest and preventing the Muslim domination of Eastern Europe. In the 8th century, the Khazar ruling class converted to Judaism, which surprised historians. After the fall of the Khazar kingdom, some historians hypothesize that many Eastern European Jews may have descended from the Khazars rather than the ancient Israelites.
The book states that the true ancestors of western jewry were not semites, but rather the warrior empire of the khazars, a mighty power that converted to judaism in the dark ages, and whose subsequent exodus gave birth to the main stream of the jewish people as they now exist

00:00 Part One: Rise and Fall of the Khazars
00:16 Chapter 1: The Rise of the Khazar Empire
01:36:31 Chapter 2: The Conversion to Judaism
02:28:20 Chapter 3: The Viking Threat and Decline
03:30:33 Chapter 4: The Fall of the Capital
04:23:26 Part Two: The Heritage (Exodus to Poland)
05:00:36 Chapter 6: Origins of Eastern Jewry
05:20:36 Chapter 7: Yiddish and Cultural Cross Currents
05:44:17 Chapter 8: Race, Genetics, and the "Jewish Type"
06:22:14 Summary of Arguments
06:25:41 Appendices
06:30:14 Appendix II: Note on Sources
06:48:59 Appendix III: The Khazar Correspondence
07:04:04 Appendix IV: Some Implications - Israel and the Diaspora
07:11:32 Selected Bibliography