Power?

[Lollipop_The_King]

You have a magic book.
Only people that know magic can see its contents, otherwise, they appear as blank pages. The contents can also be changed to appear as something else.
What power is this?

 

[Sir_Ovens]

Perception Manipulation.

 

[Tony_di_bugalu]

I saw the tittle and I couldn't help it

POWER!

 

[Imaginym]

You have a magic book.
Only people that know magic can see its contents, otherwise, they appear as blank pages. The contents can also be changed to appear as something else.
What power is this?

Maybe Text Manipulation? If it can detect when people are viewing the pages, maybe Enhanced Senses are involved?