I'm not an expert on religion, especially comparative religion. So, I will forego any personal recommendations. But, in general, when looking for books on a to

I'm not an expert on religion, especially comparative religion. So, I will forego any personal recommendations. But, in general, when looking for books on a topic, one of my first stops is fivebooks.com, where they have experts recommend their favorite books on some topic. I know this is a list of books, plural, rather than "book", as the literal text of your question would imply. Still, here is their page on religion: https://fivebooks.com/category/religion/ https://fivebooks.com/category/religion/