The chickens at the farm are building a wall, and no one is quite sure why. But they know one thing: the hedgehog that wandered in must be trouble. So all winter they build and build. When spring comes around, the chickens discover that they haven't been quite as effective at keeping the hedgehog out as they thought, and that maybe their prickly visitor isn't quite as dangerous as they thought either. This hilarious tale, with its colorful and appealing illustrations, creates a perfect space to ask some profound questions about fear and about the ways that we view strangers.