@Dabaha Your impression is different to mine so your argument seems wrong to me.
To me the book is magic and what it does, and what is does is it transfers the experiences and skills of past users to new users. It does nothing else. Thats the suspension of disbelief, it works within reality with human potential at max, making you preternatural at best. The only supernatural thing is the transfer.
It doesnt mean the book rewrites reality. If not someone might as well say, "Today i learned how to reverse entropy, go back in time and resurrect the dead oh and I reworked physics to suit my need." And the next user becomes a virtual god.