As I was packing the night before, I previewed this scene: I packed a Flash, a gorillapod and a Skyporttrigger to light the usual dark hut scenes. Feeling like a freak, I unpacked my stuff and attached my strobe on a pole of the Bookshelf right of the scene. It worked to my pleasure. I guess, I am a freak - carying an DSLR and Strobist gear over the Swiss mountains to make a shot like this.
Light: 430EX bouncing with 1/4 power, 24mm of the books of a bookshelf manhigh to the right of this scene, camera on manual mode.