The Gemini Connection by Teri Polen

Planet Tage is dying, and the best hope of saving it is gone.

Seventeen-year-old identical twins Evan and Simon share an extraordinary bond, a trait that’s both useful and invasive. They use their connection in their work at Scientific Innovations. Evan is a Mindbender, someone who enters the minds of scientists to spark ideas, join thoughts, and battle nightmares. Simon is a science prodigy and Tage’s best chance of survival.

Unfortunately, their unusual link often bleeds into their private lives. When Evan discovers his brother is keeping a secret from him, he lashes out and ignores requests to talk, and even pleas for help. By the time Evan tunes back in, he finds their connection severed and Simon missing.

Evan finds allies among enemies and adversaries among friends. If he fails, he’ll lose both his brother and his world.