Answer to “Room Escape Puzzle 2”

Don’t break the glass jar with the hammer or the deadly bees will get out and sting you.

Instead see the bees in the jar as a
visual clue, “ two bees” sounds like “to be”
as in “To be or not to be, that is the question”,
from Hamlet’s famous soliloquy written by
William Shakespeare.

This in turn is a clue that the key to the door is inside “The Complete Works Of Shakespeare” on the bookshelf.