We also improved the work area for the librarian. In the discussion with her, she mentioned how she would very much hope that there be a work space big enough and easy to work where she could fix damaged books and so forth.
What should I upload in this Develop Solutions step?
Consider uploading images (JPG, GIF) of your rough digital model. It's ok if your model is still a work in progress. Show an axonometric or perspective view with people, which will help others understand the scale of your library.