The Kretzmann Project. The Popular Commentary of the Bible by Paul E. Kretzmann, Ph. D., D. D., has been a favorite among confessional Lutherans since publication of the first volume in 1921. The four volume work, completed in 1924, consists of nearly 3,000 pages. Kretzmann, as it is popularly known, has been out of print for quite some time. Many of us have found copies in used bookstores. The project was initiated so that Kretzmann can be available to everyone with the click of a mouse.