The Crystal Portal — Joyce Holland

From the moment Dinah Masters and Nero Lockwood meet, sparks begin to fly. And not just the kind ignited by romance, but the kind that starts fires. Fighting their burning attraction is out of the question, because they soon learn they can trust no one but each other. When superheroes are created, they must pick a cause. Dinah chooses one that can change the world, one little person at a time. But at every turn they learn secrets hidden for centuries, secrets that come with power they never imagined. And power is a two edged sword, it can kill or cure.