Books in meeting rooms are nearly all personal property, usually of faculty, and are so labeled while those in shelves by cubicles belong to those in those cubicles.
Honor any posted borrowing policy.
If there is no borrowing policy posted, obtain permission before taking a book from a shelf.
Return all books once you are done - do *not* leave them sitting unused on your desk for days or weeks.
Borrowed books should remain in the RAD Lab outside of arrangements with the book's owner.
If you are borrowing a particular book on a regular basis, consider ordering a personal copy.