i find the book invaulable. yes, just pouilly and sancerre and satellites, so it goes as far as chateaumeillant and coteaux genois. it was jacqueline (plus schildknecht) that steered me to pierre morin and claude riffault. the writeups on the producers and their wines are detailed and informative.
jacqueline has plans (or in the past has had plans) for books on the middle loire and on the nantais, but 8 years later nothing has been forthcoming. i emailed here some years back inquiring about when they would be published, and i recall something about a hard drive crash with no back up.