I think his spoilers are true. He isn’t really a joker. He is Death, not the Disney Hades from Hercules. Yes, I believe Death when he says that all these bad stuff will happen. I feel like I can still enjoy the book and ending if I have already read it because some things are so good that you want to keep doing it. When you reread something you might see something you didn’t see before or get some new insight on some stuff. I personally learned more when I reread something. There can be something you didn’t see before that is very beneficial.