Not a favorite, but profound nonetheless.
The Scarlet Letter, like most Hawthorne works, is a piece on original sin. It's chock full of symbolism, big words, and puritans. So if that sounds fun, great! If not, that's cool. Personally, I found the book to be very smart and full of sad truths about sin and hypocrisy, but not something I would read for enjoyment (Sadly). There is little (if any) questionable content apart from the premise, and I would mainly recommend this for older teens due to it's difficulty rather than it's content.