What is the most careful way to remove books from shelves in the reading room?

If you wish to take a book off a shelf in the reading room, first push the neighbouring books towards the back. In this way, you can easily grasp the sides of the book with your thumb and index finger to pull it out. This prevents you having to pull the book out by the spine, which can easily cause it to tear. Alternatively, you can remove the book by grasping the section near the back of the shelf and pushing it forwards slightly.