Fatal Convergence — Bryan Davis

In the final installment in the Time Echoes Trilogy, the three Earths are ready to collide. As they close in, Fatal Convergence begins taking placeâ€"the deaths of duplicates on two of the three worlds. When Nathan learns one way to stop the tragedy, by killing three innocent people who represent the three worlds, he balks, intent on finding another solution. When Kelly is absorbed into a nightmare world, Nathan must search for her, not only because of their friendship but also because her talents could be the key to saving everyone. With billions of lives hanging in the balance, failure is not an option.