Show in OPAC search results and in OPAC record details, something (a label, an image) that identifies if the logged patron had some item of the record on his possession. This will allow patrons identified which books books had read or not.
I think this is a great idea but I don't know how we would implement it
I like the idea too, but think it would be nice to make this optional. When sitting an a public computer, I might not want to see my read books highlighted. Maybe a checkbox you can check to activate highlighting on demand?