Books that questions the Reality & Our perception of Reality

What makes what we say "Real", real. Who said the black fan beside me is actually black, what is even black. What if our brain is generating all that we perceive as reality in a big synchronisation with each other.

What if we are just thinking Inside the box and all the unexplained things that we explain in strange ways. Are not actually the right explanation. But they're the proof of something we don't know.

For example if someone else is watching humans from outside that's why when they try to rewrite something from everyone's mind, that's when the unexplained anomaly happens? (Now definitely do not suggest books about gods or aliens, that was just an example).

How powerful is brain lol, I wonder if our perception is the actual one, what is even actual or real? Who decides what's real. If every human sees things the same way biologically then it becomes real. But what if there's something more. Cause what we can't process, our brain makes up something for it.

Now you can Recommend books For and against it. Against means the books that'll say why what we know is a significant amount and alot of it is right of what we consider reality. And For will mean books that thinks like how I said.

Also I think this will include the scientific or any other thought process behind things like Paranormal. I'm open to different suggestions actually, so Go On.

Can be Fiction or Non fiction