* My book, The Modern Period: Menstruation in Twentieth-Century America, is on sale for $30 hardcover! When you were 14, if you had your period, but your parents couldn’t buy you pads or tampons, would you have gone to school? It’s unimaginable, right? It would have been too gross and humiliating to even consider. Better to pretend to be sick, and deal with the missed work and the bad grades. In many parts of the world, that’s exactly what happens. And that means that girls d