Play Book Tag discussion

Cassie is a sixteen year old surviving on her own after aliens have attacked Earth. Later the book switches to other characters also affected by the waves of attacks from the aliens. I thought the book started good but then it got bogged down and didn't go much of anywhere during the middle portion. I thought the idea of an alien attack was creepy but I didn't like any of the main characters. I won't bother reading the rest of the trilogy.