The 5th Wave: The 5th Wave

The first in a triology featuring Cassiopeia, known as Cassie, Sullivan, a 16-year-old girl trying to survive an alien invasion of Earth. The plot centers around Cassie's quest to save her younger brother, who has been taken to a training facility called Camp Haven. Along the way, she has many adventures, including meeting the Silencer, who is responsible for all the destruction.