Siren Songs: Sirens of the Zombie Apocalypse, Book 2 by EE Isherwood

Liam and Grandma have crossed the river to the suburbs, leaving the zombies on the far shore. So why is the battle for survival just getting started?

Fifteen-year-old Liam Peters was successful in rescuing his 104-year-old great-grandmother from the worst of the zombie plague in the urban hell. They were finally in the suburbs, ready to enjoy the safety and calm they'd been after. All he had to do was get Grandma to his survivalist father and he could rest easy without the burden of caring for her. Should be a piece of cake.

As a voracious reader of zombie literature, Liam knows nothing is ever as it seems during the zombie apocalypse, so he's ready for letdown. True to form, the tranquility is shattered when he accepts a ride with a local police officer. The officer's small town is fighting to keep the citizens of nearby St. Louis from crossing bridges over the river to safety. When the zombies show up behind the blockades, nothing will stop the desperate men and women from storming the town's defenses. The crowds arrive with murder in their eyes.

Liam and Grandma are swept up in the destruction, always with an eye for what's behind the mobs of angry refugees. As they race for Liam's suburban home, the swelling zombie horde pushes the wave of fleeing humanity into the suburbs and ensures there's no peace or security for anyone. Liam's entanglement with a military convoy sets events in motion which reveal the presence of a government research facility, a refuge filled with Boy Scouts, and the first hint of a cure to the zombie plague.

As he endures many challenges in the hills and forests outside the sprawl, he learns the government itself is chewing up test subjects in their quest for that cure. Only when he stumbles upon a mass grave does he finally see the direct threat to his grandma.