Yes, it is. The story of 'Slow Horses' has its roots in real - life spy scenarios. It takes inspiration from the murky world of intelligence operations where things are not always as they seem on the surface. There are often internal power struggles, moles, and complex operations just like in the story.
It's a spy thriller. It follows a group of misfit intelligence agents in a slow horses department. They deal with various espionage - related issues and often find themselves in dangerous and complex situations.
There is also River Cartwright. He is a young agent trying to find his place among the misfits in the slow horses. Another important character is Diana Taverner. She is involved in the power dynamics within the intelligence agency. These characters interact in complex ways, with their own goals and secrets that drive the plot forward in the 'slow horses novel'.
Jackson Lamb is a very notable character. He's the head of Slough House and has a rather unorthodox leadership style. He's gruff, often seems lazy, but is actually very shrewd.
The ending of 'The Birds' is both mysterious and thought - provoking. After the intense and harrowing experiences of being attacked by the birds, Melanie, Mitch, and the others are able to get into a car and start to drive away. The birds that were once so aggressive have become quiet. Hitchcock deliberately left this ending open - ended. It could be that the birds' aggression was a short - lived phenomenon, or it could be that they were simply following some instinctual pattern that had run its course. This ending also serves to heighten the sense of dread and the unknown. We are left with the characters, and by extension, the audience, still in a state of fear and uncertainty as they leave the scene of the attacks, not knowing if the birds could resume their attacks at any time in the future.