thanks for playing, noted your raised points. I am planning on release a complete walkthrough today, I will share it here once it's ready.

Completing the library is like completing just 1/4 of the game. Hope you complete the remaining parts once you find a way out of library.

Here is the hint to find the way - 

If you hit what looks like a dead end along a wall, try pushing into the left or right corner. There's just enough of a gap for you to slip past the pillars.

Hope this helps.