If you're looking for the best non-fiction audio books for free, there are a few different options available to you. Here are some places to start:
Your local library: Many libraries offer free access to ebooks and audiobooks through services like OverDrive or Hoopla. All you need is a library card to get started, and you may be able to borrow many popular non-fiction titles for free.
Project Gutenberg: This website offers a large collection of free, public domain audiobooks, including many non-fiction works. You can search by author or title, and many books can be downloaded in multiple formats.
Librivox: Another volunteer-run organization, Librivox offers free audiobooks of public domain works read by volunteers. While the selection may be more limited than other sites, you can find many classic non-fiction works here for free.
YouTube: While not all audiobooks are available on YouTube, you can often find recordings of non-fiction books that have been uploaded by users. Just be sure to check the legality of the upload before listening.
Podcasts: While not technically audiobooks, many podcasts offer deep dives into non-fiction topics and can be an excellent source of information on a variety of subjects. Plus, they're free to listen to and often updated regularly.
No matter where you choose to look for free non-fiction audiobooks, remember that the selection may be limited and not all titles may be available for free. However, with a little digging, you're sure to find some amazing non-fiction works to listen to without spending a dime. Happy listening!