By playing pure and simple rock & roll without making an explicit issue of her gender, Joan Jett became a figurehead for several generations of female rockers. Jett's brand of rock & roll is loud and stripped-down, yet with overpowering hooks -- a combination of the Stones' tough, sinewy image and beat, AC/DC chords, and glam rock hooks. As the numerous covers she has recorded show, she adheres both to rock tradition and breaks with it -- she plays classic three-chord rock & roll, yet she also loves the trashy elements (in particular, Gary Glitter) of it as well, and she plays...