This is similar to the Hidden Drawer Book Box (with the same height of 6-1/4"), except this version has shelves! The height between the shelves is just over 1-1/4".
Laser cut from sturdy chipboard. Assembly is required, but it's super easy with a slat and groove system. You'll need to apply quality glue to keep everything in place.
The photos show one put together but this set arrives flat.