Ta'amei HaMinhagim U’Mekorei HaDinim (“Reasons for the Customs and Sources of the Laws”) by Rabbi Avraham Yitzchak Sperling explains the origins and reasons for over a thousand Jewish customs. The work includes practices unique to certain communities, including, for example, different chasidic communities. Immediately popular, it was revised and expanded five times by the author and has been published many times since. His grandson, Rabbi Moshe Sperling, published an edition combining the core work and shorter supplements by the author, alongside new material and indexes.