The Alien Invasion Apocalypse Warriors

In Book 10 of the Zombie Apocalypse Call Center series, Sidney faces the challenge of uniting humans and zombies to combat an alien invasion that threatens all life on Earth. With conventional weapons powerless against the aliens, she must persuade Sam, the zombie leader, to fight—knowing it could cost him his remaining humanity—and foster cooperation between humans and zombies to stand a chance against the extraterrestrial threat.