The complete series of The Hitchhiker Strain by Kellie Sheridan

Includes...
End Dayz, Mortality and Duality

END DAYZ
It's month after the dead first began to walk. The miracle vaccine that was supposed to save us all has failed.

Now, four teens fight to stay alive as a stronger, smarter breed of zombie begins to appear, threatening to end humanity for good.

MORTALITY
After surviving a deadly plague outbreak, sixteen-year-old Savannah thought she had lived through the very worst of human history. There was no way to know that the miracle vaccine would put everyone at risk for a fate worse than un-death.

Now, two very different kinds of infected walk the Earth, intent on nothing but feeding and destroying what little remains of civilization. When the inoculated are bitten, infection means watching on in silent horror as self-control disappears and the idea of feasting on loved ones becomes increasingly hard to ignore.

Starving and forced to live inside of the abandoned high school, all Savannah wants is the chance to fight back. When a strange boy arrives with a plan to set everything right, she gets her chance. Meeting Cole changes everything. Mere survival will never be enough.