Yesterday I stumbled upon an Android related online book named “Programming Android“. This book is published online while being under development and uses the Open Feedback Publishing System (OFPS). With that system, early readers can provide comments next to any paragraph while reading. It is essentially a nice way to provide direct feedback.
I just skimmed through the book, but only from that little time it was apparent that it is well written and it can definitely be a tool to your Android programming toolbox. The main author is Zigurd Mednieks and the book can be found in O’Reilly’s catalog here. Check it out.