Is it permissible to take extra books from the school with the permission of someone who is not the owner?

Question:
He says: I am a teacher at a private school, and I teach the religious subjects for the elementary stage. I saw that these books being taught are beneficial, so I wanted to acquire them from the elementary level up to the secondary level. He says: So I asked the person in charge of the warehouse for permission, and he gave them to me. His question is: Is there a sin on me for that? And is it necessary to go back to the owner of the school? Knowing that these books are extra in the warehouse?

Answer:
Yes, if the one you asked for permission does not have the authority, it is not sufficient. It is obligatory for you to ask the one who has the authority to give them away for permission.