I really wish that people would be a little more careful with this type of stuff. There are no sealed books in Revelation, that verse is in Daniel 12. John was told
not to write something, not to write it and seal it up.
I suspect that this is going to turn out to be more reinforcement for the accuracy of the fragments we already have.
Boy do I have egg on my face now. I completely forgot about the seven seals that begin the Tribulation period. I really, really, really hope that this isn't that book.