Hi, MOTF!
I'm on the fly, but had a quick idea--without knowing more about what he's interested in, it's difficult to make suggestions, but maybe biography or local history? My suggestion, based on your location, is Ivan Doig's Winter Brothers--it's a dual diary of the Seattle writer Ivan Doig (my favourite contemporary writer) and the 1850s Washington settler James Gilchrist Swan. Doig follows Swan's footsteps--maybe you and your son could take a little trip around some of the places, too?
I'll rustle up a couple other ideas for you after I've rustled up Sunday lunch for the peanuts!
minnie
