Halachah's and commentaries on Hilchat Mikvaot, written by Rabbi Chaim Tzvi Teitelbaum, called the Atzei Chaim. Also includes She'elot U'Tshuvot (questions and answers), based on this topic, from Rabbi Moshe Teitelbaum, the Yismach Moshe, and Yekusiel Yehuda Teitelbaum known as the Yetev Lev.

Rabbi Chaim Tzvi Teitelbaum, was born in 1880 on January 21 and died in 1926. He was the Rabbi of Sighet and the author of the book 'Atzei Chaim'. His father, Chananyah Yom Tov Lipa Teitelbaum, was known as the Kedushas Yom Tov and he had an elder brother called Rabbi Joel Teitelbaum, the grand Rabbi of Satmar. Rabbi Chaim Tzvi was the father of Rabbi Moshe Teitelbaum, the Beirech Moshe, which was the late Satmar Rebbe.