How to Listen to Earth Below on iPhone

Because Apple doesn’t support .m4b audiobook downloads directly, we’ve packaged it in a .zip file. It’s easy to open and play using a free app called BookPlayer.

Step-by-step:

1. Download the BookPlayer app (free):
   Get BookPlayer on the App Store

2. Tap the button above to download the audiobook ZIP file

3. Once it finishes downloading, tap the file to unzip it
   You’ll see a new file called EarthBelow.m4b

4. Open the BookPlayer app
   Tap the + button, then choose “Browse Files”

5. Go to your Downloads folder, and select EarthBelow.m4b

The audiobook will appear in your BookPlayer library... with chapters, resume playback, bookmarks, and speed control.