In some cases, as you can see, I’ve made notes about certain useful-to-know details. If you have additional information about any of these sites, feel free to share it in the comments. It would also be great to hear if you have tried any of them, and how they have worked for you.
Please let me know if you find any broken links or outdated info, or if you know of any paid promo sites for free books that I have not listed. I will try to maintain this list and keep it as thorough and accurate as possible!
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