Here are some specific locations mentioned in the book:
* London: This is where Alex Rider's home is located, as well as MI6 headquarters and the Stormbreaker facility.
* Cornwall: The book mentions a scene where Alex is taken to a secluded beach in Cornwall, presumably to be trained for the mission.
* Switzerland: The book also mentions a scene where Alex visits Switzerland, potentially for a mission-related purpose.
However, the majority of the story takes place in London, focusing on the locations of MI6, Alex's apartment, and the Stormbreaker facility.