Black Magnet - David Neth - Bog

The city is heating up...
Ash doesn't know who he is or how he ended up in an old coal mine outside the city. Even more terrifying, he discovers that he can throw fire from the palms of his hands when he saves Rachel from being mugged. She's a researcher, who develops a curiosity for his powers. With the help of Rachel and her coworker, Perry, Ash tries to piece together what happened to him.

They soon encounter another super they call the Gatekeeper, who knows Ash's history and holds a grudge against him for it that he expects Ash to pay for. But the Gatekeeper seems to be more powerful than Ash's own moniker: Heat. With the Gatekeeper's apprentice, Black Magnet, terrorizing the city, Heat will have to fight his way to uncover answers about his past.
However, those answers won't set him free.