"Men or women who are born, as you were, without a conscience or the ability to feel guilt ... without you, without predators—people who can think the unthinkable and act without fear or hesitation—the world stands still. You are an evolutionary necessity."
Villanelle is one of the world's most skilled assassins. Plucked from a Russian prison, where she would have served a life sentence for killing her father's murderers, she works for a shadowy organisation, whose motives she doesn't question. She kills whoever she is told to kill and in exchange, she leads a comfortable life in a flat in Paris. Meanwhile in England, former MI6 operative Eve Polastri is hired to head a task force with the sole purpose of tracking down and stopping Villanelle.
Codename Villanelle, by Luke Jennings, is an exciting spy thriller which was the basis for the television series Killing Eve, starring Sandra Oh (of Grey's Anatomy and Catfight) as Eve Polastri and Jodie Comer as Villanelle. The book is different from the TV series as far as some minor plot points go, which makes it possible to enjoy both the book and the show without either one really spoiling the other. The essence of the story, including the deadly cat and mouse game between Eve and Villanelle remains the same.