As an adult learning about his personal history/development and late conversion to Catholicism explained a lot of what confused the kid version of me who read the books decades earlier
He converted to Anglicanism, not Catholicism, to the dismay of his friend Tolkien.
Last Battle left an impression on my younger self that was far greater than the other books which I enjoyed but didn't experience such a visceral interaction with.
Other than a weird interest in Turkish Delight despite now knowing that it is probably not as enticing as I might imagine.
If you're in the US, try to get some "Aplets and Cotlets". They're a delicious variety of Turkish Delight made in Washington state from apples and apricots.