More questions than answers. 
 So the concept is that Gene is a human living in a world taken over by these creatures...I'm not sure if they're vampires or some other monsters, but they act somewhat like vampires. They sleep hanging upside down (how the hell do the hidden humans fake that? That's never entirely explained), they eat flesh, not just drink blood, they don't have body hair, they don't show emotions except to scratch the inside of their wrist when they find something amusing, they don't sweat...etc. 
 Poor Gene is trying to survive as a lone human in a world filled with monsters. In order to do this, he has to shave daily, use deodorant religiously in order NOT to stink (not an easy task, being a teenage boy and not stinking to high heavens) or sweat (again, teenage boy), try not to blink with so much emotion (an exaggeration, but not so much). 
 Really, it's easier to just go on the freaking run. It's like the equivalent of being a black police officer going undercover in a KKK commune. IT'S A BAD IDEA. 
 The monsters in this world are caricatures. I get the image of Count Dracula in a kitschy black & white film going "I VAAAAAAAAANT TO SUUUUUUUUUUUCK YOUR BLOOOOOOOD." They start slavering and drooling at any hint of an impending meal of delicious humans (known as hepers)...they literally start drooling. Not very scary. 
 Then there's the background. What background? How did the world come to be as it was? How did the vampire/monster hierarchy with the head master come about? How did Gene and his family manage to survive or even get to the vampire city...what about his grandparents? And the heper dome/farm? Give the surviving humans more credit than that. 
 This book feels like a poorly written farce of the dystopian genre.