An open book printed in two parts so that you can easily have the cover a different colour to the pages. You will need to use some glue.
The model is very big and you'll definitely need to scale it down in your slicer software. It will print very small and needs no supports if printed with the flat sides on the bed. You will need a brim if printing small as it can easily fall over.
You will probably want to scale the model down!