Editions of CommonsWare books that are four years old or have had over 4,000 paid subscribers are released under a Creative Commons license.
The following editions of GraphQL and Android have been released under the Creative Commons Attribution Non-Commercial Share Alike 4.0 License:
Please understand that these books are significantly out of date. Android keeps advancing, and these books will refer to classes, tools, and techniques that are no longer available or recommended. You are strongly encouraged to obtain other Android development knowledge — whether from CommonsWare or somebody else — that is more current to go along with anything you obtain from here.