First published at the outbreak of World War II, The Holy Ghost (renamed The Holy Spirit for this printing) answers the need of many people for a deeper and more accurate knowledge of the Holy Spirit. The Holy Spirit's role in creation as the fountain of life and the first of God's gifts is studied along with the Spirit's mission, divine filiation, and the principles of supernatural growth.

A detailed summary of the book has been prepared by Rev. Robert P. Bucciarelli to enhance reading of the text.