So, the Observer published a list of their 50 best cookbooks of all time: http://www.guardian.co.uk/lifeandstyle/2010/aug/13/50-best-cookbooks-ofm
Then the Guardian (part of the same website/newpaper) just published a list of what the author thinks are the worst food books, partly in response to the first article: http://www.guardian.co.uk/lifeandstyle/wordofmouth/2010/aug/20/worst-food-books
They then talk to food writers about their own favourites: http://www.guardian.co.uk/lifeandstyle/series/ofm-50-best-cookbooks
These lists are guaranteed to cause discussion, dissent and general chatter, which is why the newspapers love to publish them. Still, useful sometimes to discover books you hadn't heard of or had forgotten. In this case, it's quite British, but does include a few US and Australian titles. I have to say, I haven't read most of them. Some work to do...