Mary Roberts Rinehart (1876-1958) was the most beloved and best-selling mystery writer in America in the first half of the twentieth century. Born in Pittsburgh to the owner of a sewing machine factory, she wrote fiction in her spare time until a stock market crash sent her and her husband into debt, forcing her to lean on her writing to pay the bills. Her first two novels, The Circular Staircase (1908) and The Man in Lower Ten (1909), established her as a bright young talent, and it wasn’t long before she was a regular on bestseller lists.Among her dozens of novels were The Amazing Adventures of Letitia Carberry (1911) and The Bat (1932), which was among the inspirations for Bob Kane’s Batman. Today, Rinehart is often called an American Agatha Christie, even though she was much more popular than Christie during her heyday. Otto Penzler, the creator of American Mystery Classics, is also the founder of The Mysterious Press (1975); MysteriousPress.com (2011), an electronic-book publishing company; and New York City’s Mysterious Bookshop (1979). He has won a Raven, the Ellery Queen Award, two Edgars (for the Encyclopedia of Mystery and Detection, 1977, and The Lineup, 2010), and lifetime achievement awards from NoirCon and The Strand Magazine. He has edited more than 70 anthologies and written extensively about mystery fiction.