Once inside, go forward and take the door on your left with the broken staircase in front of it. Go around it and through the door to the right; then take the second door on the left. You will see either a clickable bookcase on your left or a clickable pile of books to your right.

The location for the bookcase is -19.2, 0, -62.1. The location for the pile of books is -24, 0.26, -61.6.