While opening my Uranometria, I happened to grab it such that the title page opened up. I typically don't look at this page often, but it holds one of my most treasured astronomical memories. At the Texas Star Party in 1999 (the only time I've ever been), I met Stephen James O'Meara and had him sign it. (Yes, he doesn't have anything to do with the atlas, but it is what I had with me!)
I noticed that I am now older than Stephen was when he signed this! Wild.