The seriously cool Lili Lite from Studio Smeets Design is a reading light, bookmark and bookshelf all in one. To turn off the light, you must put your book over the ‘bookmark’ as shown in the picture to engage a sensor. When you lift the book off, the light will come back on again. Available at lili lite for 99 euro, but–you know what I’m thinkin’–something similar would be DIYable, sensor and all. The only tricky bit would be to find a triangular-shaped light. (I love the ‘mine & yours’ pic on lili lite’s website.) Via.