Well, you do have a few options.
1. If you purchased the kindle content via Amazon, you can follow these steps to read it free on computer desktop (Mac, PC) https://www.amazon.com/gp/help/customer/display.html?nodeId=GZSM7D8A85WKPYYD
2. You can try to source the PDF content at https://annas-archive.org, which it brings together all the Libgen forks, Zlib, and The Internet Archive/Open Library
3. Look up using Calibre ebook reader/creator/editor