Just don't forget batteries for his hearing aid. :~D
Nah, he doesn't need a hearing aid (yet). Not that old (only 44-ish).
One gift suggestion for any book geek in your life is The Eye of the World, part of the Wheel of Time series by Robert Jordan. Don't know how much it'd be now (I'm borrowing it from Homo_homini_lupus), but Alibris always has good deals on books. I got a hardback book there for $1-ish. Good book. Firekeeper saga's good too.