I read the first two books a while ago, and then decided to pick up Predators of Darkness again after seeing how many people loved it like I did and the  fact that I hadn't read the third book yet.  I can say that it is just as good the second time around.  Even knowing what happened and who the clones were, I was captivated, still reading with new/old eyes in to the nuances of the characters and subtle shifts that were telltale signs I didn't see the first time around.  The plot is your basic survival/end of the world story line.  We have a community of people, there are power struggles and physical struggles, but the survivors seem to have a hierarchy system in place that actually works.  This is where we meeting our hero Daniel, while not the `leader', or even the one who herded the survivors into the fallout shelter to begin with, he's a leader all his own. He and his best friend Lucas are the main ones who go out looking for caches of supplies and food.  This is where the story twists.