Shaarei Teshuvah

Author: Rabbi Dovber Schneerson, the Miteler Rebbe
Publisher: Kehot Publication Society
Annotated By: Rabbi Alexander Z. Piekarski 
Format: 6" x 9" Hardcover, 620 Pages 
Language: Hebrew 

Literally called Portals of Repentance, this tract consists of two sections.

The first part expounds upon repentance through prayer.

The second initiates us into a deeper meaning of the 'Shema'.

This classic is reset and published in a newly annotated edition which includes extensive notes, references and indexes.

This book is a collection of Chassidic discourses, comprised of two parts.

• The first part is subdivided into "Shaar Hat'shuvah," discussing one's return to G-d; "Shaar Hab'chirah," discussing free choice; and "Shaar Hat'fillah," discussing davening.
• The second part includes a second "Shaar Hat'shuvah," as well as a discourse entitled "Chinuch" (Education).