Best Android programming Books

If you are looking for Books about Android  Programming to advance your Knowledge, here is the best  list in various formats available for free:

• Agile Android Software Development – Etienne Savard (PDF, epub, mobi)
• Android 4 App Development Essentials
• Android 5 Programming by Example – Kyle Mew, Packt. (email address requested, not required)
• Android Developer Fundamentals Course – Concepts
• Android Developer Fundamentals Course – Practicals
• Android NDK Beginner’s Guide – Second Edition – Sylvain Ratabouil, Packt. (email address requested, not required)
• Android NDK Game Development Cookbook – Sergey Kosarevsky & Viktor Latypov, Packt. (email address requested, not required)
• Android Notes (PDF)
• Android Programming Guide for Beginners (PDF – need email confirmation)
• Android Programming Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• CodePath Android Cliffnotes
• Coreservlets Android Programming Tutorial
• Expert Android and Eclipse development knowledge
• Google Android Developer Training
• RxJava for Android App Development (email address requested, not required)
• Styling Android
• The Busy Coder’s Guide to Android Development (PDF – older versions)
• Tutorial Point Android Tutorial (PDF)