Great creative game concept but feels a bit unpolished. Here are a few things I noticed:
* Game crashes when you press Ctrl and move
* Running doesn't raise the noise meter (might be intentional)
* I was missing some instructions on the controls. You get told to press F to sit down and get back up but I couldn't figure out how to place the book on the table (or if I was even holding the right one though I'm guessing if I go to the 'E' Shelf it will take out the right book from the list?
So my playthrough went something like this:
Keep running through the library to not get noticed by the librarian, check what books to get, get one out of the shelf, sit down, try stuff, get caught by the librarian while trying to figure out what to do
Other than that:
Top Level design, the sounds that are there are great and improve the athmosphere, the game feels right for what it's trying to do and there's toilets!