In our continuing coverage of the Harry Potter season, here's the story so far, Book 3.
Harry Potter and the Prisoner of Azkaban is where the series, so far about an idyllic school and childish wonder, begins to turn really dark.
Arguably the best book of the lot so far, it introduces key new characters, and spells out just how at loggerheads the Ministry of Magic is with Albus Dumbledore in particular, how ruthless it can be, and how politicised the wizard world is.
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