Nikki Tesla and the Traitors of the Lost Spark

In the third book of the series, a brilliant teen named Nikki Tesla and her friends from the now-closed Genius Academy must stop a shadowy figure called "V" from releasing a lethal virus that threatens to wipe out humanity. As they dig deeper, they realize the villain is closer to home than they ever imagined, and they must also contend with the fallout of an international incident that shut down their school. With the world's fate hanging in the balance, Nikki faces a personal sacrifice that could cost her life.