The ASI library is on the NAI campus. I haven't used it much yet, but I'll provide this practical advice in case you are trying to find it. Read the previous post on the NAI. Note the part where I wrote "Confidently walk forward. The museum is on the left, and there is a sign on the building saying it is the National Archives Museum. Keep walking straight, the path leads right to the building that has the RR."
To get to the ASI library, walk forward as if you are going to the RR. Instead of going up the front stairs and into the RR building, however, take a right turn and head toward the canteen. Don't go to the canteen, instead turn immediately left at the end of the RR building and head to the back of the building.
Trust me. I know this looks wrong. You will get to the back of the building and think, WTF? There are only boys smoking and dogs wallowing in garbage heaps back here, this can't be right. But really, it is. Walk toward the garbage pile. When you are almost there, there is a door in the back of the building. It is a small door, probably hanging open, without any sort of sign. This is the front door to the ASI library. You need to go up to the 2nd floor (where there IS a sign), check your bag, and then wander around inside the library until you hear voices. When you hear voices, follow them, and ask for help. This approach worked for me, anyway.