I had pre-ordered NT322 Book Study: The Gospel of Luke by Dr. Darrell L. Bock (10 hour course) which is going to be out soon. However, I noted that I already own a course Mobile Ed: NT316 Book Study: The Gospel of Luke by Dr. Andrew W. Pitts (13 hour course). I could not understand the logic of having two Mobile Ed study courses on one book. Are these two different courses teach Gospel of Luke from different perspectives or are supplementary to each other? Are we going to have two book Mobile Ed study courses for a single book of the bible in future? Any help is appreciated.