I'm a librarian, and I think that the reason that Enid Blyton books were banned from some libraries in the 1960s was that librarians thought that she was trashy and low brow, rather than from any reasons of politcal correctness. I think that came later. Some librarians also disliked Roald Dahl, for similar reasons.
Personally, I think Enid Blyton and Roald Dahl books are fantastic, because they are books that children actually want to read. (I do think that at 13 Beamish Boy is too old for Enid Blyton, though, so he can hardly be blamed for saying he doesn't like the books) It's actually quite hard to get hold of many Enid Blyton books nowadays. We buy the Famous Five, Secret Seven and Malory Towers books for our library, but are sometimes asked for other Enid Blyton titles, which are just not in print any more. We no longer have them in stock in our libraries, as they have been withdrawn for being too old and tatty.
Incidentally, I've been on holiday to Achensee, and never realised that it was the location of the Chalet School books!
