4-Year Effort To Collect Data On Book Sales Is a Step Closer
Bookscan, VNU unit, is set to announce accord to pay Borders Group for sales data from its bookstore chains after four-year effort to build system for disseminating book sales data; has similar deal with Barnes & Noble and Barnesandnoble.com sibling, some big retailers and independent stores; system will make it hard for publishers and authors to dissemble about disappointing sales and challenge established best-seller lists, which are based on statistical samples rather than numerical count; could help publishers sharpen marketing and sales forecast (M)