How exciting to find hoarded/forgotten texts in an age when non destructive palimpsest analysis through modern imaging techniques has improved leaps and bounds.
Who knows what lies underneath the top layers of usage?
Texts were copied laboriously by hand. Each one carrys stories of where it came from. It could inform trade links from monastic scribe houses across the globe. It could have DNA fragments of value.
It almost certainly has pictures of cats in it, somewhere. Doing strange things with snails.