The impressively versatile Joanne Harris in her psychological thriller mode, at her darkest and most unsettling. After thirty years at St Oswald's Grammar in North Yorkshire, Latin master Roy Straitley has seen all kinds of boys come and go. Each class has its clowns, its rebels, its underdogs, its 'Brodie' boys who, whilst of course he doesn't have avourites, hold a special place in an old teacher's heart. But every so often there's a boy who doesn't fit the mould. A trouble