Simply touch, and NOOK takes care of the rest. The NOOK Simple Touch brings everything you want in an eReader and more. Featuring E Ink pearl display, 16-level grayscale, you can read in sunlight without the hassle of glare. All fonts and text sizes are adjustable and the NOOK is completely Ad-free. 2GB of built in memory holds up to 1,000 books, and if you need more space, an a MicroSD slot allows expansion of up to 32GB. Other features include the ability to borrow eBooks from your local library and a batter life that lasts over 2 months on a single charge!