Um... Novellas?

This week's Road Trip Wednesday question asks:

This month's Bookmobile selection, The Madman's Daughter by Megan Shepherd, is inspired by The Island of Doctor Moreau, and its sequel takes inspiration from the Strange Case of Dr Jekyll and Mr Hyde. What other novellas would you like to see inspire YA books?
Okay, this is an easy one. My answer is none. Because I've never read a novella.
Nope, not one. Can't think of any. Maybe there's been one sometime...? Or maybe for school... ?
I seriously can't think of one. The only novellas I have on my bookshelf are Daimon and Elixir, both by Jennifer Armentrout, both part of her Covenant series. I'm pretty sure neither of those are based on anything.
Wait, wait. Is A Christmas Carol by Charles Dickens a novella? Because I've read that. That could make an interested YA book, although there's been so many movie versions done it might be a little exhausted.
Can anyone recommend some novellas that I absolutely must read? Or maybe when I go through everyone else's answers I'll realize that I've actually read a novella or two sometime in my life.