A very satisfying end to the series, Dust unwraps one more layer of mystery from the world created in Wool.

I enjoyed the series for its ability to add more secrets without contradicting the original premise. In Wool, we learn that there are more silos. In Shift, we learn that one silo is not just in charge, but vastly different in character from the others, and get some pieces of why the silos were built in the first place. In Dust, we finally find out the whole twisted tale of the silos, and the tale of sacrifice continues to a very appropriate conclusion.