A public building where written things are all diagramed out in a way that lets you find said written things? That sounds like a library to me!
The 書館 part should be readable by you, but it's the 図 that's troublesome with an alternate reading from the one you learned. Imagine yourself at the library. You check out every single book you can about the human toe (と). You have a giant stack of books on it, then you drop it... ironically on your toe. You decide to show Khan (your buddy) your smashed toe.
Did you know that you can even borrow ebooks from the library?
If you go straight, you'll see the library's bathroom at the end of this aisle ahead.
"When is your New Year's vacation? I want to go to the library with you." "I have five days off starting December 30th, but I’m afraid the library will be closed too."