It is about an ex MI6 agent and the digital world and the dark net (the hidden part of the internet used for bad things and which intrigues me!). The book moves between continents and has the characters working together. The M16 Agent and Lucy work together to stop the hackers. I really enjoyed the story. The blurb didn‘t do it as much for me as the others in the series but it wasn‘t an issue when I stated reading. I would recommend the series.