London Rules

*Pre-order Clown Town, the ninth novel in Mick Herron''s Slough House series, now*

*Now an award-winning Apple TV+ series starring Gary Oldman, Kristin Scott Thomas and Jack Lowden*

''Mick Herron is the John le Carré of our generation'' Val McDermid

''The best thriller writer in Britain today'' Sunday Express

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At Regent''s Park, the Intelligence Service HQ, new First Desk Claude Whelan is learning ...