With Digital Book Application Users in the Millions—and Growing Rapidly—Should You Be Offering Apps? A Q&A about Houghton Mifflin Harcourt's pioneering efforts with mobile phone e-book applications

Earlier this month, research company Flurry (Flurry.com) reported that between April and July, the number of digital book application users increased by 300 percent. In July, Flurry tracked nearly 3 million active e-book application users on smartphones. While these numbers may make many book publishers think, "We need to start offering this," a number of publishers already are active in the mobile e-book application space, including Houghton Mifflin Harcourt (HMH).