What was the climax of the book?

In order to answer this question, one must first define climax. In literature, the climax of a story occurs when the central conflict of the story escalates and the protagonist is forced to make a decision. Some would say the best synonym for climax is "turning point," but I would argue that this is an oversimplification. Instead, it's best to determine the primary conflict a protagonist faces and identify the point in the story at which the protagonist is finally confronted with the full weight of that conflict.
In Iris Johansen's The Face of Deception, the protagonist, Eve Duncan, faces several conflicts. The biggest of these, though, is how Duncan is pursued by nefarious enemies after she discovers the real identity of her latest forensic sculpture assignment.
If the central conflict is indeed man versus man, then the climax would naturally be when Eve Duncan must grapple with her enemies. Therefore, it is most logical to say that the climax is when Duncan's loyal friend Quinn is able to get the ruthless Albert Fiske—who has been killing every possible witness who knows the true identity of the sculpture—to stop his bloody quest.
However, one might argue that this is not the true climax, because Duncan is not directly involved in the decision-making process. Because of that, one could say that the climax of the story is when Duncan finally takes matters into her own hands instead of relying on her male friends.