Hunger (The Gone Series)

It's been three months since everyone under the age of fifteen became trapped in the bubble known as the FAYZ. Things have only gotten worse. Food is running out, and each day more kids are developing supernatural abilities. Soon tension rises between those with powers and those without, and when an unspeakable tragedy occurs, chaos erupts. It's the normals against the mutants, and the battle promises to turn bloody.

But something more dangerous lurks. A sinister creature known as the Darkness has begun to call to the survivors in the FAYZ. It needs their powers to sustain its own. When the Darkness calls, someone will answer -- with deadly results.