His books
Betzur Yarum
A commentary on the Tanya, edited from decades of his daily Tanya classes
Dozens of volumes: Likutei Amarim, Shaar HaYichud VehaEmunah, Igeret HaTeshuvah · Hameir Laarets
Passages from this book will be added to the site soon.
Courtesy of the Hameir Laarets institute, headed by his son Rabbi Yisrael Abergel.