See this legally free ebook:

  • Conferences on the Blessed Trinity, by Rev. Dr. J.J. O’Connell, O.S.B. (New York: Catholic Publication Society, 1882). With Imprimatur. Available in various formats at Internet Archive and Open Library.

On the Feast of the Transfiguration in the one true Church. For other legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject). Blessed be God in His angels and in His saints!