“How do you misuse glasses?” I scoff. “Well, supposedly, you smash the lenses, sharpen the biggest fragment on the floor of your bunker, hide it in your collar, and try to slit a soldier’s throat with it.” Sima Yi shakes his head at Li Shimin, who turns back to the window with a much duller gaze than before. “Seriously, I will not be able to get them back for you a second ti—” Sima Yi does a double take on me. “Don’t look impressed!”