Alice in Wonderland/Through the Looking Glass are simple but unusual reads due to the language used and pacing.

If you're open to Comic books, 2 lines that I really enjoyed that lean into classic literature:
- Fables - Features fables type characters (Snow White, Big Bad Wolf, Tales of Arabian nights, pretty much any public domain character (human or otherwise) you could imagine) and puts them in modern times/conflict. Nothing like the TV series that sounds similar.
- League of Extraordinary Gentlemen - Similar concept to the movie, but much better done in written form, as well as a little disturbing

Enjoy.

I know nothing about you other than you like classics and have never read a comic book. If you want to try something different but classic, you shoul read “Maus”.

First graphic novel to win a Pulitzer.