Walmart sees its massive price cuts as a way to gain market share quickly as they enter the online bookselling marketplace at a time when e-book readers and Apple iPhones and iPads make the e-book format popular. Amazon has demonstrated that in the short term it is more than capable of competing with Walmart on price. As of this case’s writing, Amazon had raised its price on the Under the Dome back up to $17. Walmart’s price, of course, was $16.99. The two sites have had similar clashes over many high-profile books, like J.K. Rowling’s Harry Potter and the Half-Blood Prince and James Patterson’s I, Alex Cross, the latter selling for $13.00 on Amazon and $12.99 on Walmart.com as of this writing.