A friend of mine recently asked whether I had a list of books “that have been particularly impactful or interesting,” especially in the realm of spirituality and religion—and suggested that if I didn’t already have such a list, I could put one together for one of my next blog posts. It took me a while to actually put the list together, but it’s ended up being a really interesting exercise. Of the forty books that I’ve picked, some have been more influential than others.