If You Don’t Return Books You Borrow, You Should Die… And Other Medieval Curses

All of which sound totally legit to me.

The use of these book curses seemingly sits at odds with the monastic lifestyle. Medieval monks dedicated their lives to imitating Christ, including his virtues of patience, forgiveness and love for mankind. The fact that monks used these curses testifies to the immense material and spiritual value that they attributed to their libraries: their books had not only been extremely costly and labour-intensive to produce, but often they also contained the only copies of a particular work to which their communities had access. The loss of a book did not only mean a material loss, but it could have permanently deprived a religious community of a work of knowledge that was essential for preserving or developing its religious identity. This may explain why some religious communities went to great lengths to protect their books. Book curses were a radical but effective way of preserving their book collections.