What is the most unhinged book you ever read?

I regularly read some pretty unhinged romance books where a third of the plot is basically sex, all the characters are of course super buff and busty and the actual plot is somewhat irrelevant, just there to cause drama (also downright dumb at times, if they just think logically for a minute half of the plot could be solved). I feel like I lose some self respect half of the time I read them but I can't stop, they're addictive. For some reason these books help me through a dry phase, read some unhinged romance book and then get back to reading A Little Life or something.

Now, I know for a fact that I am not alone in this experience. so guys, what is the most unhinged, "wtf is this" (but not in an intellectual way), book you have read, and still enjoyed somehow? Doesn't have to be romance of course.

Sidenote, I mean no disrespect to the authors of these books. I admire the fact that they actually managed to finish writing a book, and I'm obviously reading them so I am in no position to judge.