When your NOOK has been idle, your NOOK goes to “sleep.” Your NOOK displays a screensaver on the screen (by default, a portrait of an author). It also locks the screen so that accidental touches do not perform actions.
To wake up your NOOK, do this:
1. Press the Quick Nav button (the raised NOOK symbol on the lower front panel of your NOOK).
2. Unlock your NOOK. Swipe your finger across the rightward pointing arrows between the closed lock symbol and the unclosed lock symbol on the screen.
Slide your finger across the row of locks on the screen to unlock your NOOK.