Wool

Very interesting dystopian concept: earth has become uninhabitable and humanity lives under earth, in a huge silo. Recreating society and class division on it's 144 levels. But there are mysteries and too many rules that seem to keep people from asking questions.

The story is told from the point-of-view of different characters, which worked well for the sheriff, the mayor and Juliette, but then felt flat for Lucas and the rest. Also, there is a really good twist at the end of the first segment (Sheriff), that then needs to be rediscovered by another character later on, that repetition being rather boring for the reader. But, I understand that the first segment had been released as a standalone story beforehand, so changing it for the sake of longer sustained mysteries wouldn't have worked.

All in all, I loved the concept and the potential of the world, but while the book started strong it continuously lost steam along the way. Don't feel compelled to read more of the series.