Review: Simply an Awesome Book 4 to the original Silo Saga
Rating: 5 out of 5
Date: 05 8, 2014
I found Karma to be excellent and was really book four for the original Silo trilogy as it tells the story of one of the original people from the trilogy from before the time that the survivors entered the silo.  I would strongly recommend reading Karma right after a person finishes the original trilogy.