Surviving The Evacuation, Book 9: Ireland - Surviving The Evacuation, #9

Within a few minutes of the outbreak, Manhattan was overrun by the living dead. Within a few days, the undead had reached every corner of the globe. Ireland was no exception. There was no evacuation of Northern Ireland, and no quarantine in the Republic. A Royal Naval blockade prevented ships from docking, but they didn't prevent those who could reach the coast from fleeing by sea. There weren't enough boats for everyone.
Those who were left behind took refuge in castles, police stations, churches, military bases, and any other buildings with strong walls. The walls weren't strong enough. Eight months later, there are only a few dozen survivors left on the entire island of Ireland. They are certain that there is no safe refuge anywhere on the planet. Stranded on the southwestern Atlantic coast of the Irish Republic, Bill and Kim head north.
They know that there is a safe haven on Anglesey, but that is hundreds of miles of undead Ireland and a treacherous sea crossing away. They begin a journey on which they will have to rescue the innocent and confront the past before they can embrace the future. Set on the island of Ireland, eight months after the outbreak, this is the next volume of Bill Wright's journals.