I probably shouldn't be the first to post here but it's turning into a slow day
The oldest book I own now is likely younger than I am but I still grumble about my mother throwing out an old trunk of my grandfather's books that I had been allowed to keep, they were books he had read as a child himself so I'm guessing that puts them about the 40's-50's. There was a real feeling of a private treasure when I started reading them and now I wish I had them on the shelf incase my children ever wanted to have a look when they were older, I could always replace the ones I could remember but of course then they won't be my grandfather's books which was half the fun of them.
The oldest book I've seen is probably the
Book of Kells, well two pages of it at least but the book I'm most thankful to have been able to see was Da Vinci's
Codex Leicester which was one of his scientific journals (written back to front) at the time it was at an exhibition at the Chateau de Chambord which is famous for its double helix staircase that Da Vinci
may have hand a hand in designing.
Beautiful place, beautiful book... I just wish I had been able to read it

.