The New York Times Book Review is expanding its bestseller lists as of next week; now there'll be 110 bestsellers all told. Paperback listings will be broken out into mass market and trade paperback categories. The expansion comes at the cost of an editorial page. Why the change? "'It's completely ad driven,' says a top executive at one of the major houses. 'People want to buy a position next to the lists.' Publishers are also more likely to buy ads—whether in the weekday books pages of the Times or in the Book Review—when their titles are New York Times best sellers." [New York Business]