I buy stuff on Amazon. A lot of people don't know this about Amazon but Amazon has a charitable side. "smile dot amazon dot com"

If you type it into your search engine, you can sign on to your amazon account and select who to donate money to. Your every purchase, as long as you go through Amazon Smile first can allow your selected pick to get a donation from Amazon.

You can select from the selection they have or type in the organization you want them to donate to. So, you can donate to organizations that help authors, your favorite library, etc.

And self-publishing authors on Amazon can get up to 70% profit from each sale they make if you buy their books on Amazon. So, that is another way you can help the authors.