Check out this legally free audiobook:

  • Studies in the Literature of Sherlock Holmes (Audiobook), by Ronald A. Knox, from Sources in the Literature of Sherlock Holmes (1911). Available at Internet Archive (Maria Lectrix Audio Books, August 2, 2006), which states: “The foundation document for Sherlockian studies, this is also a hilarious satire of Biblical and literary criticism. The author, Ronald A. Knox, later became better known as Msgr. Ronald A. Knox, Bible translator and mystery writer.”