All the action you might want from an espionage thriller is to be found in Real Tigers, with betrayal, double-dealing and a fantastically violent climax in an underground facility, but the true pleasures of Mick Herron’s Gold Dagger-winning Slough House series lie elsewhere: in the sharp wit and dry irony and elegant grace of the prose, the razor-sharp characterisation … Think Le Carré with fewer posh people and laugh-out-loud funny. Mick Herron is the real deal.