Horowitz delivers a blockbuster thrill ride in this, his final Alex Rider novel. When Ian Rider died at the hands of the assassin Yassen Gregorovich, Alex, ready or not, was thrust into the world of international espionage and became the world’s only teenage spy. Alex vowed revenge against Yassen and the two have battled ever since. In some ways, Alex and Yassen are mirror images of each other. Yet the paths they must travel turn them into mortal enemies. This is Yassen’s story about a journey down a darkened path.