Evolution Gene Rebellion, Book 4, (Paperback)

There is no evolution without sacrifice. The weak must fall, for the strong to rise.

Chris is dead. And Liz is done running. Haunted by grief, she wages a one-woman war in the streets of San Francisco. With nothing left to lose, she'll burn the system to the ground. But even a genetically-engineered girl with wings has her limits-and Liz is up against an army. Sooner or later, her recklessness will have a cost. But who will pay the price?

Meanwhile, the Chead are no longer in hiding. Led by the ancient Talisa, the superhuman horde sweeps across the countryside, decimating towns and reaping bloody slaughter. Only the young are spared-so they might become Chead themselves. With refugees flooding into the Western Allied States, the tyrannical government might just be humanity's last hope.

Vengeance or survival. Liz must choose. If she can't, there may be no world left to save.