Overdue library books!
"A book printed almost 500 years ago, which has been missing from the Archbishop Marsh’s Library in Dublin for 100 years, has made its way back home. The book, one of a five-volume set of a Theodore Gulston’s copy of the works of Galen, was returned on Friday by an anonymous do-gooder who had found the book in a junk shop. After a century away, the book has been returned to its set relatively unscathed."
http://www.worldirish.com/listening-...-in-dublin-648
There were even notes from the author and revisions inside. The book looks pretty darn good too.