|Subject: Re: Torino, Piemonte, Asti, Alba, etc.|
maybe it is not what you are looking for, but the Lonely Planet
series has a book for Milan, Turin and Genoa. It has sections on
the Aosta Valley and the Lakes.
The Rough Guides might have something. I have seen their Italy guide and it is quite good.
Rgds, Covadonga Bilbao - Spain