Item description:

Simply go up the stairs and Blink on to the bookshelves on the right. Then Blink on to the light above the table. Wait for a good time to blink behind the only man left in the room and knock him out (hold RB), take the key off the small table to the right of the fireplace and then release the hostage to complete the game....Should unlock Resolution, Mostly Flesh and Steel, Clean Hands, Ghost, Shadow, and Just Dark Enough (JDE unlocks at the end of the cut scene)