YES!! You got it, pedln.
Her co-authors in the first book were Simone Beck and Luisette Bertholle.
The book spearheaded a wave of American interest in learning to cook the French dishes. Her recipes actually worked well and tasted like the food we were coming to love from the newly available cheap travel to Europe.
One of her later books, The Way to Cook, is an excellent general reference, fairly comprehensive, with many recipes simpler, quicker, and less rich than Mastering, and lots of pitfalls pointed out.
She had several very popular TV cooking shows.
Julie and Julia is the recent movie. I was afraid it wouldn't be very good, but it is. Meryl Streep is excellent, and the whole thing is a lark.
She lived in Sri Lanka, France, Germany, Norway (Paul was in the State Department) and I've probably left out some countries.
I didn't expect anyone to get the character, just put it in for fun. It's butter--arguably her most important ingredient.