Maseches Avos Im Biur Mishnas Yisrael and other important Ma'amarim at the end. Replete with words of Mussar and Hashkafah that were learned by the Talmiddim of Harav HaGaon Chaim Yisroel HaLevi Belsky zt"l. This sefer was collated from shiurim, seforim, and snippets of conversation with Rav Belsky.