Thanks, @Samalex. I've written a bunch of 86/286/386 clone PC manuals after I finished college. And I briefly was a contract tech writer at Apple for a Hypercard-type programming environment that never shipped. I've spent most of my career writing books about animal agribusiness and vegetarianism, and I publish Vegan.com.
I've owned an iPad for the past couple of years but there was something about the Nexus 7 that really appealed to me. It's going to take me a long time to gain the skill-set to understand its more esoteric features, but it looked to me like nobody was writing much about it for the newbie audience. I doubt many people on this site would want a book as basic as the one I'm writing. It's more a book for your mothers and fathers who've never owned a tablet, and who think that the cloud is where birds Twitter.