You are facing towards the bookshelf, take a left turn move forward and again take a left turn near the round table. You will see an open door beside the book shelf to your left side, go out of that room ,you will see a door to your right side which is open walk through that door. Take a right turn after coming out of that door, you will see a way and glass door which is close and steps to your right and left side, stand at the center.