Another solid outing from Mr Herron. There are dimishing returns with any formula driven series – which, for all its wit, intelligence and biting political commentary, the Slough House books still are. But the writing improves book on book, the characterisation is exceptional, and while some instalments have more pizazz than others, I've not yet read one that is anything less than very enjoyable. On to Bad Actors next, and then I'm all caught up.