Ebook sales have fallen 10 percent in the first five months of 2015. The surge of electronic books between 2008 and 2010 coupled with the stress of economic depression on independent bookstores seemed a portent of an all-digital future, but print books remain and many digital consumers are returning to physical books. The New York Times looks into the shifting market place and explores how technological innovation is now being used to bolster print, like faster delivery of physical books to independent shops.