Trapped in that post-Google I/O funk of hurry up, pre-order and wait? Maybe this can satiate your desires: a Nexus 7 guidebook detailing the basics of Mountain View's upcoming slate. The digital tome covers standard Android usage as well as Jelly Bean specific tips -- including the OS' dynamically resizable widgets, using Google Now cards and "blink for face unlock," a stock Android take on Samsung's eyelid shuttering identification tweak. Ready to read up? Check it out at the Google Play link below.