In reply to Jesse Nagel:
@Jesse probably worth noting that none of the books you mention are in English as far as I'm aware.
@OP: +1 to the SAC portal, which seems very comprehensive and modern, and much if not all of the content now appears to be translated into English as well.
Martin Moran's 4000m Peaks is still the go-to English guide book for the big peaks although Arolla of course doesn't really feature.
The SAC Oberwallis book has a great deal of sport and multipitch rock for the Valais and is in English. Also Swiss Plaisir Ost and West (band 2) for rock.
Swiss Plaisir Alpin - small book but in English and has some routes on sub-4k peaks e.g. normal route on Aiguille de la Tsa.