Everything you need to understand or teach The Reapers Are the Angels by Alden John Bell.
As the story opens, Temple is happily living alone in a lighthouse just off the Florida coast. She is content being alone but one day a zombie arrives on the shore of the island. Though he's beat up and can't be a threat at all, she realizes this means others will follow and reluctantly returns to the mainland where she finds a car and heads north.
Temple has been living on...