Take a break from reading. Watch a movie, take long walks, go shopping, whatever. Don't read. Be bored for a bit.

Then go to a library/bookstore, browse a bit and pick something that sounds interesting to you. Don't google reviews, don't ask the internet (Goodreads, Reddit, etc) if they think it's good. Just pick something that speaks to you.

Eventually, you'll come across a book that you'll want to read and your slump will be over.