For me books are the symbols of freedom, they sharp our minds, broad our horizons, show new paths and routs to take. So when I came across flying books, floating books, hanging books and other installations with books I was thrilled. They represent all I need and all I look for: space, a little mystery, beauty, sensitivity. There's something special in objects hanging from the sky you know. On the one hand you need to be ready for an unexpected (things can find their way down), and on the other you must be certain that nothing unexpected will happen.
It may sound too deep, let me just conclude with a cliche: I love it and it looks magical.