From the American Booksellers Association:
Nielsen has sold its U.S. market information and research services for the book industry to the NPD Group. The sale, announced on January 20, includes U.S.-based BookScan, PubTrack™ Digital, PubTrack™ Higher Education, PubTrack™ Christian, Books & Consumers™, PubEasy®, and PubNet®, all of which will become NPD-branded services in the U.S.
Nielsen will provide operations support for NPD BookScan and related U.S. services during a transition period, and no immediate changes are expected in the way American Booksellers Association member stores report to the Indie Bestseller Lists via BookScan.
NPD, which has been in business for more than 50 years, provides market information and analytic solutions for over 20 industries and partners with more than 1,200 retailers, representing over 165,000 stores worldwide.
Link to the rest at American Booksellers Association