Samsung and Barnes Noble announced on Thursday a co-branded device called the Galaxy Tab 4 Nook, a 7-inch reading-focused tablet designed to compete with the Kindle Fire HDX and the Nexus 7. Its the first sign of life in some time for the Nook brand, the lineup of ebook readers and tablets that have been consistently great but never popular enough to unseat Amazon as king of the reading device. Now, however, with the combined retail and marketing weight of Samsung and Barnes Noble, the Galaxy Tab 4 Nook may have the might to find a place once again. For Barnes Noble, its a chance to keep Nook alive while offloading the hardware production to a better-equipped company so that it will focus on books and content.