I was at Buoux a couple of weeks ago. I have an old book but the latest one would be worth getting if
you're there for a week - one route I was trying to locate, for example, no longer exists. I'm sure you
could pick up a book in Apt. If not, you'll find climbers there most days with books and the starts of most
of the climbs are identified.
Buoux still felt like the home of the hard people to me. Anything above 5c felt solid and there's virtually
nothing easier. A lot of the routes are polished. I checked out the terrace area above the Emoro/Beda
sector and the pitches up there were good as well (and a little less polished).