Well, as we are talking of librarians leaving with books, let me offer a supportive argument towards my favorite librarian.
You want to know who is not going to leave taking books with them?
The We.
If The We is picked as a librarian, they will be the most dependable librarian imaginable, they will defend the library to death (or very close to), and they will never leave taking precious books with them.
Because they can't.
Ok, they could, but doing so would be incredibly risky because of their nature, The We is going to remain in the library until forced to leave, and they are going to value those books like they were their very life.
No other librarian is going to be so dedicated (well, some Verenans might be, but even then only some), so dependable, or so loyal to the institution, as The We.