The End of Everything: Book 6

Robyn and Wren have fought the zombie hordes. They have battled ruthless thugs and lowlifes. Together, they have done the impossible. But now they are faced with a new horror neither could have imagined. Stretched to the very limits of their physical and mental endurance, the clock is ticking. They thought they knew what terror was. They were wrong. They thought they knew what pain was. They were wrong. This is a foe like no other. This is a fight like no other. This is a fear like no other. This is the end of everything.