The last Book/Inhabitant in the Arts Center is located "behind" the elevator. Basically, you need the elevator to go up, then you can make your way to the room behind it. There are a couple of ways to proceed. First, either press the button in the elevator then get out quickly(so it does not take you up with it), or the second way, from the outside, aim and hit the button with a soda can.
I hope this helps. Let me know, should you require further assistance. Thanks.
I did go crazy....dark figures stalk me....I enter the grocery store and see....mining helmets and pickaxes....always the mine....maybe the mountain is haunted.... :):):) Great game, very frustrating final collectibles.