Free stuff is good, and if you're an Android developer looking to get into the Intel dev scene, then there's a free book on Amazon that should be just what you need. It's called "Android Application Development for the Intel Platform" (man I really love catchy book titles), and it's normally $40. The paperback version is still going for $35, but if you can handle reading on your device, the Kindle Edition costs approximately zero monies right now.
I love freebies. Picking one up is liking buying something nice, only without the cost. For a limited time, you can download a free copy of Android Photography by Colby Brown. It's a simple primer for learning how to take photos using a, preferably stock, Android phone or tablet.
The basics, and I do mean basics, are covered here. The book opens with a description of the best way to hold a phone for both horizontal and vertical pictures, and while this may seem obvious to some users, there's no shame in admitting if your picture-taking form could use some work.