In "On the Edge of Freedom," David Smith breaks new ground by illuminating the unique development of antislavery sentiment in south central Pennsylvania—a border region of a border state with a complicated history of slavery, antislavery activism, and unequal freedom. During the antebellum decades every single fugitive slave escaping by land east of the Appalachian Mountains had to pass through the region, where they faced both significant opportunities and substantial risks. While the hundreds of fugitives traveling through south central Pennsylvania (defined as Adams, Franklin, and Cumberland counties) during this period were aided by an effective Underground Railroad, they also faced slave catchers and informers. "Underground" work such as helping fugitive slaves appealed to border antislavery activists who shied away from agitating for immediate abolition in a region with social, economic, and kinship ties to the South. And, as early antislavery protests met fierce resistance, area activists adopted a less confrontational approach, employing the more traditional political tools of the petition and legal action.