I'm always wary of posts looking for a person, however I picked up a book in a local book exchange place the other day which is quite old and has a dedication 'in memory of John Smith' (obviously not the real name) and was donated to an organisation in memory of them.
WIBU to post details on social media to try and find the family of this obviously deceased person in case they'd like to have the book? It ended up a long way from where it originated as it has the area that the person was from and we're nowhere near there.