In 2010 Israel Katz called Abraham Zevi Idelsohn “the undisputed pioneer-scholar of Jewish music”. Part of Idelsohn’s claim to fame is his comprehensive survey Jewish Music in its Historical Development, written while he was cataloging the Eduard Birnbaum Collection of Jewish Music at Hebrew Union College. Covering Jewish music and its various influences from Biblical times to the early 20th century, the book was published in 1929, and joins the public domain in 6 days. #PublicDomainDayCountdown