I had a really odd nightmare just a bit ago.
It started out as a normal dream with no clear direction and just me wandering around my dreamscape home, then I found this very odd leather bound book with no spine but silver embossed letters. It was a book that looked ancient, but when I opened it up, it had a recent and complete transcript of all my favorite tv shows in it w/ illustrations. Closing it and putting it down, the silver lettering on the front changed and formed a new title for the book, and opening it up again revealed that it had changed completely into a new book! After playing around with it for awhile, I found that it was some magic book, you could straight up ask (or think really hard) for it to become a book about a certain topic or a certain thing, and the book would know and change itself to become about it, and no matter how obscure the topic it would be highly detailed and informative.
After showing it off my to friends, I got the smart idea to ask it the obvious question: To become a book explaining itself. And it did, and it become a very short book with just a few pages. Opening it up, I'm greeted by this abstract symbol that I could wrap my mind around, and just reading the few sentences my soul is gripped in fear. I concluded that the book has to be destroyed no matter what, but it would seem that the act of reading the book allowed the book to set up camp in my mind and whenever I'd think negative things about it, horrifying hallucinations would plague me. Like huge bats flying around the room tormenting me, or I'd find needles in my skin, or I'd feel that there was always some intruder in the room with me, just staring at me; and I couldn't destroy the book because of this.
Fortunately, my good friend that I haven't seen in forever took the book away from me and because he never read it before he could just throw it in a fire no problem. I was really happy about that, but the damage was done, and the last part of my dream just has me building myself a new home on a green field.
It sounds like something you'd read out of the SCP foundation, and it's weird since I haven't been to that website in forever.