A turning point in the series

I am since my early teens the young Lou, and I am fortunate to have almost the same age when I read each of the volumes (I always fun to read.
I bought this volume the day after its release, I was waiting impatiently, and when I read, the content is absolutely not what I could imagine.
In this tome Lou is torn between adolescence and adulthood, she grew clearly. From first glance, one might think that the comic has become a comic science fiction, but we can see a kind of metaphor for the transition to adulthood, giant crystals invade the town and it captures so Lou really different. We should not see it as a Lou Lou's adolescence but as an album entirely separate reflection of the change that takes place in his world. The only thing missing in my opinion it is the dance of joy.