it is held on the bottom by guides along the sides, out of visual reach, and along the top by the supports lifting the top (as they go across the drawer). this is similar to the floating top chess board that i made a couple of years ago.
I spotted the lack of a shadow as soon as Ken mentioned the answer...but didn't think anything was odd. Thought the drawer was a place to put keys, eyeglasses and the such
I worked in bushwick NY for 35 years.
If you google it, you can see its one of the highest crime areas in America.
that's the only place I learned to watch the shadows.