Of course, the writing and prose is very beautiful and well done, and it’s easy to keep turning the page. However, I also found myself, very often, zoning out while reading, it’s not a story that grips you and holds your attention. And that’s not quite its intention, it’s a story you need to pace yourself with and really take in what it’s message is. Although, I am not religious, the beautiful prose and literary significance makes it worth the read. 
I agree with the other reviewers that Inferno was better than the other parts.