"Cass's sickness is fast deteriorating, and with temperatures plummeting, she'll only get worse. Exhausted and hungry, Isaac must continue the dangerous journey, his sick companion in his arms and Daisy at his side. If he doesn't make it, Cass will die. Perfect for fans of Ryan Schow, Grace Hamilton, Kyla Stone, and Jack Hunt, Grip of Terror is the third book in the End of Days series, a post-apocalyptic EMP survival thriller featuring flawed, complex characters, and an adrenaline-fueled action-adventure."