Query of Sevens

This is late, I apologise.

 

It is said that knowledge is power. It is also said that the owner of this book has the power to become anything, to do anything, to go anywhere… it is said that the owner of this book could be a deity, if they wished it.
But no one has seen this book in centuries. It is also said that this book is a myth – is /the/ myth. What if that is not true?