Here's why:
* Crime Fiction: The book centers around a crime - a series of murders and a larger conspiracy.
* Thriller: It features suspense, tension, and a sense of danger throughout the story. The protagonist faces constant threats and challenges.
* Noir: The book has a dark and cynical tone, with morally ambiguous characters and a bleak outlook on society. The setting often plays a role in the atmosphere, with gritty and dangerous locations.
Therefore, "Soldier X" can be classified as a crime thriller with noir elements.