It's the fifth installment in the series about Jackson Lamb and his slow horses.
At Regent's Park, the headquarters of the Intelligence Service, new First Officer Claude Whelan is learning the job. Tasked with protecting a beleaguered Prime Minister, he faces attacks from all directions: from the blowhard MP who orchestrated the Brexit vote, and who now has his sights set on Number Ten; from the blowhard's wife, a journalist, who is attacking Whelan in the press; and especially from his own aide, Lady Di Taverner. Meanwhile, the country is rocked by a series of random terrorist attacks.
Armed terrorists destroy a Derbyshire village. Soon after, a bomb explodes in a penguin enclosure at London Zoo: the intelligence service MI5 is on red alert. At Slough House, on the other hand, boredom reigns until Roderick Ho, who does the internet searches, narrowly escapes a failed assassination attempt. His colleagues come to his aid, reluctantly, and are about to rediscover their strong point: making a bad situation much worse.
A spy novel in which the author presents an MI5 in which everyone fights for power and hides everything that can discredit him. The prose is brilliant, the humor is bitter and there is a constant jump from one scenario of the action to another.
As for the moral dimension, the characters in the story have neither principles nor ideals of service to society. Their family life is broken. The author denounces immoral behavior, without explicit descriptions.