I am beyond a Raving Fan of C. S. Lewis.
There are few writers who weave together the gifts of imagination, affection, intellect, will and action as C. S. Lewis. This year I am reading lots of Lewis and many books about Lewis.
Leadership teacher and author, Bobby Clinton, recommends that leaders have historic mentors. A historic mentor is someone from the past. You access their wisdom by reading and reflecting on their life and work. I have done that for many leaders over the years (including Lincoln, Teddy Roosevelt, Winston Churchill, Mother Teresa like Nelson Mandela). I have done in-depth study and learning from the great theologians and writers on spirituality, like Ignatius of Loyola, Augustine, Calvin, Jonathan Edwards, John Owens, Wesley, Eugene Peterson and Peter Kreeft (the last two being contemporary authors).
Over the years I have read quite a bit of Lewis and from time to time would read a book about him. This year I am reading a dozen or so of his books and I have a list of about twenty books about Lewis.