A Google user
"The Bishop of Sarajevo, Yugoslavia, discovered this tremendous treasure after it had disappeared for almost two centuries, thus fulfilling a prophecy made by St. Margaret Mary. She foretold that this inspired writing would be forgotten for a time, but then would come to light again. The author (Fr. Croiset) was the spiritual director of St. Margaret Mary and therefore was intimately familiar with every aspect of the revelations given by Our Lord to this famous saint; thus, the book is actually the "key" to understanding the importance and the centrality of the Sacred Heart devotion for our lives as true Catholics. This great work was actually commissioned by Our Lord Himself through St. Margaret Mary, and as Father Croiset neared completion of it, St. Margaret told him that Our Lord said it was so completely in accord with His wishes that it would never be necessary to make any change in it. Later she revealed that it was Our Lord Himself who had inspired him with the ideas in this book and that it was so pleasing to Him that "none other but Himself could have arranged everything so much to His wishes." This magnificent work is a revelation to all just why so few of us become great saints and why so few, despite going frequently to the Sacraments, fail really to grow in the life of grace and make great progress in the spiritual order. The best there is on this important devotion!"