We had the same concern regarding agroturismo, so it is great
to know the availability of the books you mentioned. As an experiment
we stayed this year at one of them (Locanda Rosati near Orvieto)and it
was fine much better than B&Bs which are not my cup of tea.
On the other hand, speaking of travel books and since you mentioned the
Touring Club Italiano, I have serious thoughts regarding the books'accuracy.
For a short shinning moment we owned a small boutique hotel in South
Beach, and the Tourist Club Italiano in its book covering Florida included
a few big hotels like the Fontenbleau Hilton and the Biltmore and only
one small boutique hotel (ours!), I found that this was very flattering
buy highly misleading...and I could speak from an insider's point of view
regarding hotels recommended by most travel books,...to make a long story
short I do not trust them much.