By | September 26 2012 3:04 PM

Amazon and Barnes & Noble changed the way people consume literature when they introduced their Kindle and Nook e-readers in 2007 and 2009, respectively, igniting a trend that could be considered a precursor to today’s tablet industry. The online retail giant produced a follow-up to its first tablet called the Kindle Fire HD earlier this month, and now Barnes & Noble is countering with its own new line of Nook tablets, called Nook HD and Nook HD+.