It may be interesting at the end of this thread to take an inventory of the publishing dates of listed books. Will most be modern? Will many come from learned past of our elders? It is hard for me to select a favorite. However as a voracious reader there is only one author for whom I have found myself re-reading his books multiple times: Robert Sarah. He has published two books: The Power of Silence (extended reflection on silence and the human condition) God or Nothing (autobiography + reflections on current affairs)
Also recommended in this reply