This is a model of a medieval book as it would have looked on the shelf of a 'chained library'. The aim was for the books to be used only for reference and not removed. I have annotated the model giving further explanation. For a more in-depth description of chained libraries click this link https://en.wikipedia.org/wiki/Chained_library The download includes a file for printing - select 'additional file' at download. You are free to use this model in any way.