The Curse of Dusk Hollow

From the description:

The residents of Dusk Hollow are besieged each night by the walking dead. As the sun sets, they pour forth from the nearby elven ruins and assail the town, kidnap villagers, and then flee back to their dark hole when the sun rises the next morning. The local militia is overwhelmed and all they can do each night is gather the villagers inside the boarded up tavern and wait for the banging on the doors and windows to stop. They’ve sent a messenger to the nearest town begging for aid and offering what little they have as a reward to anyone who can help them.