A huge love of mine is for fairy tales and fairy tale re-tellings.
"Alice" and it's sequel "Red Queen" by Christina Henry were amazing. Super dark retelling of Alice in Wonderland. I loved the writing style and the direction she took the story.
If it's okay (mods please let me know if I need to edit this to remove), I'll recommend my own book "The Ice Maiden's Tale". It's kind of my love letter to the genre. If you like "The Princess Bride", you'll most likely enjoy it. It's an original fairy tale accessible to a wide age range of readers, which can be hard to find in the market.
If you have any favorite fairy tale related books and are on Goodreads, I've got a list going. Feel free to add to it:
https://www.goodreads.com/list/show/113126.Fairy_Tales_for_Everyone_(I'm also happy to get friend requests on Goodreads!).