Though it was also confusing since you have quite a few characters and it switches between them. And it isn’t always immediately clear who is the current character.
The aliens were seriously creepy. Especially if you continue reading and find out things, then you really feel paranoid.
The waves are an interesting idea, and I like that everything was explained and we also get a bit of how it was for them at that moment, which I sometimes miss in other books.
The characters, well I can say I love most of them.
In overall a good book, though I am not sure if I will be reading book 2.