Slavery in the South has been documented in volumes ranging from exhaustive histories to bestselling novels. But the North’s profit from–indeed, dependence on–slavery has mostly been a shameful and well-kept secret . . . until now. In this startling and superbly researched new book, three veteran New England journalists demythologize the region of America known for tolerance and liberation, revealing a place where thousands of people were held in bondage and slavery was both an economic dynamo and a necessary way of life.