The books on your bed

Okay, alright, a little creepy you think to yourself, picking up the book and opening it,
the first page looks to be a form?

" Name:
Sex:
Age:
Orientation:
----
Rules:
[User] will answer the question by writing down the answers in ink, after, the contract will be sealed
[User] will agree to not use this book on minors or animals of any specie
[User] will be able to bend reality by writing down a sentence, the sentence will become true permanently unless sentence has been marked in a bold X
[User] will be able to perform body mutation to themselves and others

Oddly, your compelled to do as the book says.

and so you do.