Of course, not everybody believes that the soul exists. I'm not even sure myself. But now and then you come across a book that you not only you enjoy reading but affects you profoundly and actually, in a small way, changes the way you think about yourself and the world. That such books exist seems to me a miracle, and especially nowdays when writing has become mostly about entertainment.
I think the first book that had a profound effect on me was Catcher in the Rye. And the last Love and Garbage by Ivan Klima. But in between, over the years, there have been at least a couple of dozen others. Indeed, for me it is one of the great pleasures of life: that unexpected moment when you happen to come across a book that you find is not merely entertaining but grips your very soul - if your soul exists that is!