
In my book, The 5th Wave, Casey has to deal with the theme of isolation as aliens have taken the shape of humans so everyone distrusts each other. This isolation causes Casey to be reckless and have a shoot first ask questions later personality. She later overcomes this when she has to team up with a total stranger to save her little brother.

The theme halfway through the eleventh plague is death and dying because recently the main character lost his grandpa to sickness and his dad is in a coma. This provides a dark feeling throughout the story as you do not know if his dad will wake up.

In my book, The Eleventh Plague, the main character, Stephen Quinn, shows much cowardice as he tends to rely on his family for support through the apocalypse, But, this changes as his grandpa dies and Stephen's dad goes into a coma. He slowly overcomes his cowardice as he has to find any supplies to help him and his dad, and protect what little he has left.