Mr Majeika and the Dinner Lady, Paperback/Humphrey Carpenter

Mrs Chipchase, the nasty dinner lady, makes lunch hour at St Barty's really unpleasant. That is, for everyone but her 'favourite friend', Hamish Bigmore. Up to his usual tricks, Hamish is allowed to eat chocolate instead of ghastly school dinners! Mr Majeika decides it's time to sort out the menu.