Rankings reflect sales for the week ended Saturday, May 14, which were reported on a confidential basis by vendors offering a wide range of general interest titles. Every week, thousands of diverse selling locations report their actual sales on hundreds of thousands of individual titles. The panel of reporting retailers is comprehensive and reflects sales in stores of all sizes and demographics across the United States. E-book rankings reflect sales from leading online vendors of e-books in a variety of popular e-reader formats. Titles are included regardless of whether they are published in both print and electronic formats or just...