Six years before she wrote Little Women, Louisa May Alcott, in financial straits, entered Pauline's Passion and Punishment, a novelette, in a newspaper contest. Not only did it win the $100 prize, but, published anonymously, it marked the first in the series of blood & thunder tales that would be her livelihood for years. In Behind a Mask, editor Madeleine Stern introduces four Alcott thrillers: Pauline's Passion and Punishment, The Mysterious...