I have seen this book mentioned so many times on this board that I am going to add it to my (already too big) collection of cook books. However, there seem to be a number of editions and many people mention having an old edition passed on by a mother/grandmother. Can anyone tell me which edition(s) is the best to buy (happy to get a second hand one although I see the 1970s editions are pretty pricey if it is in decent condition)? Reviews of the latest edition on Amazon seem to say that it is not a patch on older editions.