Where to begin. I could tell you that Wool is about humans eking out an existence in underground silos, but that's just a frame - a common one in fiction, from City of Ember to the Fallout games, it's been done. No, what this series of tales is about is people, psychological manipulation, mob mentality, and what happens when good people find out they've been lied to for a nebulous greater good they don't agree with. Post-apocalyptic dystopia books aren't normally something I seek out, but you can't beat this one. This is actually 5 novellas in one collection, but they tell a complete story, each one peeling back another layer of the mystery. Highly recommended.