When does the climax occur in stranger with my face?

In "Stranger with My Face" by Lois Duncan, the climax occurs when the protagonist, Laurie, confronts the terrifying reality of her doppelgänger, who is not only imitating her appearance but also threatening her life and identity. This intense confrontation reveals the depths of the antagonist's obsession and the stakes for Laurie, as she fights to reclaim her sense of self. The climax heightens the tension and leads to the resolution of the central conflict.