In addition to the complete RSV Second Catholic Edition Text (RSV-CE), the app includes the audio for the Gospel of Mark and FREE selection from the Ignatius Catholic Study Bible for the Gospel of Mark. At any time you can purchase the full New Testament Audio and the full Ignatius Catholic Study Bible (New Testament and an ever-expanding list of Old Testament books), annotated by Dr. Scott Hahn and Curtis Mitch. The Ignatius Catholic Study Bible includes superb notes, essays, and commentary, as well as a doctrinal index.