The 5th Wave - Rick Yancey

The 5th Wave is the first novel in the 5th Wave series. This book is about an alien invasion in five parts.

Cassie Sullivan has survived waves one through four. Now, while the fifth wave is breaking around her, Cassie is determined to rescue her brother. From what is not clear, but rescue him she will. Last time she saw him he was waving from the back of a yellow school bus. This is a great book. The various threads eventually weave into a whole. I'm looking forward to the next story in the series. Very highly recommended.