Looking to get back into fiction with some shorter novels

I haven't read any fiction in a while, and I'd like to ease back into it with some shorter books.

I'm open to anything, regardless of its usual demographic. Adventure, romance, horror, whatever. I'm open to classics, although I remember getting a bit frustrated by their old-timey vernacular. So for now I'd prefer something that is fairly easy to follow along with for non-linguists.

Thank you