"A book loves anyone who opens it."
Raison d'etre.
Reason for being.
If the book cannot be allowed to serve it's purpose, it will be sad.
It will be neglected.
Without that purpose, it cannot feel whole.
It is still acknowledged, and thus still exists as a physical being in itself, but even if that is the case, it must have a reason for existing.
And if this purpose can be fulfilled, the book has served its term.
It has no other need other than to be read.
There is always a raison d'etre.
There is always a reason.