Scripts based on
https://shkspr.mobi/blog/2021/12/quick-and-dirty-way-to-rip-an-ebook-from-android/

Getting Started:

Connect your Android device to your PC and ensure `adb devices` works with your
Android devices.

Open the first page of your ebook to capture on Android.

Follow below:

    $ ./capture.sh 1 <end page of the ebook> <name of the ebook>
    $ ./to_pdf.sh <name of the ebook>

Then, <name of the ebook>.pdf will be there.