Ryan Dalton: 3 books

The timeline is burning. No one knows why. Teenage twins Malcolm and Valentine Gilbert have defeated doomsday machines, ice monsters, and time-traveling supervillains. Yet their full potential remains out of reach. The Chrona is elusive, and without her guidance they struggle to grow in their abilities...

It's summer in Emmett's Bluff, and the ice is spreading. Six months after confronting an enemy from the future, Malcolm and Valentine Gilbert have returned to their normal teenage lives. Or, they've tried to. During the battle to save their town, a mysterious force awoke inside the twins. Time calls...

When 15-year-old twins Malcolm and Valentine Gilbert moved to a new town, they never imagined that the old house across the street could bring them so much trouble. Inside the old house, a secret machine with the power to pierce time has reawakened. Meanwhile, lightning storms are breaking out all...