The book on devotion to the Sacred Heart! Commissioned by Our Lord Himself through St. Margaret Mary (1647-1690). Written by her spiritual director, Fr. Croiset. The book is actually the "key" to understanding the importance and centrality of this devotion for our lives as Catholics. This present translation is the first in English of the unabridged book. It contains Fr. Croiset's full sketch of the Saint's life, as well as all her prayers in honor of the Sacred Heart, and a complete list of the Promises of the Sacred Heart devotion. With new cover, new typesetting and improved binding. Great!