Need a good turn-off-your-brain book series

Looking for something to take my mind off things and not looking for anything too deep or thought provoking. Preferably something with length. I’m pretty well read but hoping someone comes up with a new one in the middle of the night, lol.

Edit: Thanks for all the suggestions! I’m still listening and reading new comments, but I was trying to reply to everyone but I got more responses than I expected. Learning of a lot of new series and authors I wasn’t familiar with!