Why are some books free on Kindle?

Related questions

1. Where do kindle books download to?
2. Can you print from a Kindle Paperwhite?
3. Do you have to buy books on Kindle?
4. Are books free on Kindle?
5. Are Kindle books free?
6. Are books cheaper on Kindle?
7. Can I use my iPad as a Kindle?
8. Is 8gb enough Kindle Paperwhite?
9. Is 4gb enough for Kindle?
10. Do u have to buy books on Kindle?

Tags

1. #books
2. #common
3. #public
4. #amazon
5. #except
6. #reason
7. #makes
8. #kindle
9. #domain
10. #typically
11. #important
12. #rightsholder