Book 3: The Great Pursuit. In White, Thomas and his true love must race to stave off a war and a virus that are simultaneously ravaging two worlds populations. As time runs out in their search for a cure, suddenly a possible solution is found. Yet its ramifications are far more crushing than anyone could ever imagine-a price that may be too high to pay in either world. This final installment brings the series to a close in a completely unexpected manner, filled with final plot twists that will reward those who have taken this epic journey.