What is the climax of see how they run by ally carter?

In "See How They Run" by Ally Carter, the climax occurs when the students at the Gallagher Academy face a significant threat during a critical mission involving espionage and betrayal. As tensions rise, the protagonist, Grace, must confront both her own fears and the unfolding conspiracy that puts her friends in danger. This pivotal moment tests her loyalty and courage, leading to revelations that change the course of their adventure. The climax serves as a turning point, with high stakes that propel the story towards its resolution.