Edge of Time by Susan MacDonald
Summary: Unbeknown to the inhabitants of Earth (known as Terrans), a collective of different alien species has been fighting against an evil force named Rhozan who conquers whole worlds through the use of mind-control. Knowing Rhozan will eventually turn his sights to Earth, the collective seeds the population with genetic mutations that will make them immune to Rhozan’s powers. Teens Alec and Riley are part this new generation of Potentials, and when Rhozan begins his take-over, it is suddenly up to them and their Terran guardian Darius Finn to figure out how to stop him and prevent...
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