Here is my next Star Book. The front layer is simply a frame. The second layer is composed of a variety of vellum and thin papers so I could see how transparent the different media were. The back layer is a reverse folded panel with a hand cut heart. The purpose of the reverse folding is so I could put a battery operated tea light in place.
There is the view of the book without the tea light.
Here is the star book with the tea light illuminated and the lights turned out. The light gets projected through the cut out and onto the vellum.