The accessible e-text version of a book needs to include the original ebook's images. To preserve the original image quality, we need to first extract the images from the original ebook and then insert them into the Word document.
When you have a file that ends with
.azw3 it is a Kindle file. To extract the images you will first have to convert the file to an EPUB.
EPUBas the output format
Open containing folder
Here is a video tutorial on how to use Calibre to convert Kindle to EPUB.