Description from Amazon.com:
"Together, Roger Bennett and Josh Kun embarked on a thrilling journey, scouring the world to collect thousands of vinyl LPs from attics, garage sales, and dusty archives. Pieced together, these scratched, once-loved and now-forgotten audio gems tell a vibrant tale: the story of Jews in America. And You Shall Know Us by the Trail of Our Vinyl spans the history of Jewish recorded music from the 1940s to the 1980s, weaving an account that begins with sacred songs and ends with the holy trinity of Neil, Barbra, and Barry. The LPs found here are also a love letter to forgotten moments in Jewish American pop history, celebrating well-dressed cantors singing Christmas tunes, Long Island suburbanites dancing the mambo, and Chassidic prog-rockers."
AND they have a blog.