[odamizu]

Thanks knc1! But I am still lost and fumbling in the dark because I really don't know what I'm doing

When I try to open rootfs.img, I get "mount failed - no mountable file systems"

This may require more tech know-how than I have, but all I'm wanting is to find ReaderSDK-impl.jar and look inside to confirm that it still includes FONT_RAMP:

Spoiler:

public float[] Sy() {
    J b;
    float[] a = b.YTD("/mnt/us/FONT_RAMP");
    if (a != null && a.length > 0) {
        return a;
    }
    return (float[])ResourceBundle.getBundle("com.amazon.ebook.booklet.reader.resources.ReaderResources").getObject("font.size.mapping");
}

If there is an easy way to do this, suggestions greatly appreciated!