Thanks for those replies, some helpful ideas there. He likes to read, mainly thriller type books I think, but is particular about movies. I've been told he remembers every movie he's ever seen and doesn't like to watch one twice! The house is a bit old-fashioned in that it's stuffed with knick-knacks all over the place, I think even a picture for the wall would need to be fairly small.
I'll start off with looking to see are there any good new thrillers out, or any books on his local area from way back when.