Some GitHub projects host JavaScript-based solutions (Tampermonkey scripts) that run directly in the browser.
Here's a step-by-step guide on how to use Google Books Downloader GitHub: google books downloader github
These are the most popular and reliable. They require you to install Python on your computer. You provide the book ID (found in the URL of the Google Book), and the script handles the rest in your terminal. 2. Browser Extensions google books downloader github