Shelf to reader
A notebook that never gets lost.
Loans used to live in a notebook passed between volunteers, and a book three years overdue could go unnoticed. Now each book keeps its own history: each loan and return is a line, and late lines appear for whoever is on duty.
Catalogueeach donated book gets a code and a shelf
Lenda loan line carries the due date
Returnthe return closes the line
Reviewthe duty volunteer checks late lines weekly