Android Essentials is a no-frills, no-nonsense, code-centric run through the guts of application development on Google's Mobile OS. This book uses the development of a sample application to work through topics, focusing on giving developers the essential tools and examples required to make viable commercial applications work.
The aim of Android Best Practices by Godfrey Nolan is to help those who have already created some Android apps to move to the next level to learn and apply best practices to their Android apps to make them less buggy, better performing and easier to use. This leads to better reviews and increased visibility, which should mean more sales of your apps.
Android Apps with Eclipse provides a detailed overview of Eclipse, including steps and the screenshots to help Android developers to quickly get up to speed on Eclipse and to streamline their day-to-day software development.
Android Apps Security provides guiding principles for how to best design and develop Android apps with security in mind. The book explores techniques that developers can use to build additional layers of security into their apps beyond the security controls provided by Android itself.