Since the Sirens: Sirens of the Zombie Apocalypse, Book 1 - Post Apocalyptic Science Fiction by E.E. Isherwood

Since the Sirens
http://www.amazon.com/dp/B018H82ZYU

$0.99 (regularly $3.99) 3/21/2016 - 3/25/2016!

The emergency sirens blared for an hour. They announced the end of the old world, and the beginning of the new world of zombies.

Liam was a teenager forced to stay with his 104-year-old great-grandmother for the summer. Little did he know they would be paired together when the horsemen's trumpets sounded. Now, as they attempt to escape the city, they are challenged by rudderless refugees, a shrinking police force, a zombie-killing military, and career criminals out for one last hurrah.

They'll need a miracle to survive, but when society itself is imploding, is one miracle enough?