The excellent TV series Killing Eve was based on this book series. The TV show is better — though the book is well written. Well researched.
It would appear — at the start — to be yet another Russian female super assassin. Villanelle is not much different than the last 6 Russian sexy super killers I’ve encountered. Another La Femme Nikita.
The slightly new twist is exploring Villanelle’s weird personal connection of sex and death.
In any case, I’ll be reading the next 2 books in the series.