Vampire Earth. Think Half Life 2, with humanity being oppressed in a post apocalyptic world, but instead of interdimensional cyborgs, you have parasitic squid like aliens, the Kur, who feed off of life force. They create a race of super humanoids (think the terrifying fusion of the Reaper Vampires from Blade 2 and the Agents from the Matrix) that they can take direct control of, using them to oppress and feed on us. The books follow a resistance movement started by friendly offshoots of the Kur, the Lifeweavers, with similar abilities, unlocking and enhancing human genes to create new strains of humans who can hide their and others life energy from the 'Vampires', effectively making them the only people able to fight guerrilla warfare.
Ya know the stories of Viking berserkers that were almost impossible to kill? Yeah, those were early attempts by Lifeweavers to empower humanity to fight the Kur. And they're not the only kind of super human in the books.
The Reapers, or 'Vampires', are some of the coolest monsters I've seen in any media.