The most straightforward way to download books for offline reading is through the official Google Play Books & Audiobooks app. This method ensures your books are stored legally and securely on your Android device.

If you need a physical file (like a PDF or EPUB) to read in a different app like Moon+ Reader or Aldiko, you must use the web-based export feature.

: Next to the book you want to save, tap the Download icon (or the three-dot menu and select Download ).