I haven't seen this mentioned. Smashwords is having their Summer sale. Many books are free and several with small to large discounts. I'm sure there is something there for everyone. Click the sections marked;
"SW100" 100% off
"SSW75" 75% off
"SSW50" 50% off
"SSW25" 25% off
I'm attempting to add the link, I hope it shows proper, not affiliated.
https://www.smashwords.com/books/category/1/newest/1