There have been many positive comments over the years for the Time/Life cookbook series from the 1970s-80s. They are hard to find.
That seems to be an exception to the rule as multi-national series usually aren't that good in my experience. But there are some other good ones in my estimation.
For Europe, Phaidon Press in the UK has been printing recently some really big tomes of recipes from Italy, Silver Spoon
; Spain, 1080 Recipes
; Greece, Vefa's Kitchen
. My understanding is these are translations of classic cookbooks of those cultures, sort of their Joy of Cooking. I've been pretty impressed by all of them, but they are not for the beginner. Instructions tend to be terse and direct without explanation and tips. These are of such size that I worry for their binding over time.
Hispanic cuisine covers a lot of countries and differences. I know of no wide ranging series for these but doing some searches here on various countries and cookbooks should get you some good pointers.
Likewise with Asia but there have been a number of threads on this topic. Here's a recent one:http://www.cheftalk.com/forums/cookb...cookbooks.html