September is closer than you think, and Barnes & Noble is getting into the back-to-school spirit with a limited time deal on the Nook Tablet. Starting today, if you pick up the device from either Nook.com or one of Barnes & Noble's retail stores, you'll get a free B&N gift card worth $50 — if you purchase in-store you'll receive the card right away, while online purchases will be followed by a gift card sent via email. The deal only covers the $249 16GB version of the device and it's valid until the end of the month, so you have until July 29th to get in on the savings.