The Worlds We Make (The Fallen World, #3)

Kaelyn has proof her father's vaccine works—but the virus has stolen too much from her along the way. And the road ahead looks even longer.

When Kaelyn and her friends reached Toronto with a vaccine for the virus that has ravaged the population, they thought their journey was over. They were wrong. Now they're being tracked by the Wardens, a band of survivors as lethal as the virus. The gang's leader intends to claim the vaccine for himself, no matter what the cost.

Forced onto the road again...