Readers who have gravitated toward electronic books over printed ones have overwhelmingly chosen Kindle as their device of choice. Barnes & Noble waited two years after Amazon debuted the Kindle. That may have been their downfall. A recent study from the Book Industry Study Group indicates that 40% of adults who read e-books do so with a Kindle. The group queried was aged 13 and up.
However, it is thought that Kindle may soon lose its edge as more people turn to tablets as their go to device for reading and internet. About a third of adults own a tablet, according to Pew Research. It should be noted, however, that the Kindle app can be downloaded free on tablets and smart phones, so in my opinion, Kindle will continue to be the industry leader in ereading.