Staying on top ...

Mary Higgins Clark: The Case of the Best-Selling Author - WSJ.com. (Hat tip, Dave Lull.)

Ms. Clark knows and caters to her sales demographic. She holds book signings not just in bookstores but in big-box stores, club warehouses and grocery stores, where she regularly draws 500 people. To mark the coming April 5 release of her 43rd book, "I'll Walk Alone," a suspense novel about a woman whose identity is stolen and who stands accused of kidnapping her own son, she'll meet fans at a Wegmans grocery store in Collegeville, Pa. She'll hold signings in seven more states and in France, where her books have sold 24 million copies.