A Nook Color is one of the Barnes & Noble e-readers. Unlike the original Nook, the Nook Color has a color touchscreen that enables you to interact with any text you're reading and experience the bright colors of your favorite glossy magazines. It is available at any Barnes & Noble store and at http://www.barnesandnoble.com for $249.
A nook color is a popular a small tablet that holds books and magazines. You can read them on the nook and take them anywhere. As long as you have an internet connection you can also download books onto the nook. The nook color can be purchased via http://www.barnesandnoble.com/nookcolor/index.asp.