Since 1935, roller derby has thrilled fans and skaters with its constant action, hard hits, and edgy attitude. However, though its participants' athleticism is undeniable, roller derby has never been accepted as a "real" sport. Michella M. Marino, herself a former skater, tackles the history of a sport that has long been a cultural mainstay for one reason both utterly simple and infinitely complex: roller derby has always been coed. Richly illustrated...