Leonard Cassuto's cultural history links the testosterone-saturated heroes of American crime stories to the sensitive women of the nineteenth-century sentimental novel. From classics like The Big Sleep and The Talented Mr. Ripley to neglected paperback gems, Cassuto chronicles the dialogue mdash;centered on the power of sympathy mdash;between these popular genres and the sweeping social changes of the twentieth century, ending with a surprising connection between today's serial killers and the domestic fictions of long ago.