I think it's going to be incredibly difficult for Mayle to better Hotel Pastis, but this is definitely a book along similar lines. I've been inspired to comment because at present I can only see bad reviews on this page, which simply don't do justice to this great read.
I think this is Mayle's fourth fiction, following Hotel Pastis, Anything Considered and Chasing Cézanne, and I was very glad to see he's still writing in 2004. If you've read them all, it is easy to see the similarities between the characters in each story. There's always the hard-done-by English ex-pat, the love interest, usually a housekeeper or similar, a life-long friend and a handful of other rogues along for the journey. This story is no different, only that the base this time is a vinyard, rather than a hotel, an apartment or flat in Monte Carlo. The tale is primed, as usual, with the twists and turns we've come to expect from Mayle, uncovering criminal activity that somehow bumbles into them, and the ensuing chase that always proves to be amusing.
All in all, this is definitely worth buying if your're looking for a light, sweet, and thoroughly amusing tale that loves to twist and keep you on your toes. It might do a little for your french too!