By Saint Leonard of Port Maurice

Published by TAN Books and Publishing

2012, Softcover, 110 pages

This book describes the great spiritual power of the Mass, how it holds back the wrath of God, its wonderful eternal and temporal benefits and several excellent ways to pray at Mass. Hidden Treasure is the prototype book on the Mass for all other books on the same subject; others basically repeat what this small book contains. (From the Goodreads Website)