Mortal, Book 6 in the Surviving the Zombie Apocalypse series, picks up immediately where "Allegiance: Surviving the Zombie Apocalypse" left off.Outbreak Day 16: With an estimated ninety-nine percent of the United States' population having already succumbed to the Omega Virus and reanimated to form roving hordes of flesh-eating monsters, two groups of survivors struggle against long odds to survive the zombie apocalypse.Returning from a mission to...