Your books and other content (such as book titles, cover art and product descriptions) must adhere to these content guidelines. We reserve the right to make judgments about whether content is appropriate and to choose not to offer it. We may also terminate your participation in the KDP program if you don't adhere to these content guidelines.
We don't accept pornography or offensive depictions of graphic sexual acts.
What we deem offensive is probably about what you would expect.
Illegal and infringing content
We take violations of laws and proprietary rights very seriously. It is your responsibility to ensure that your content doesn't violate laws or copyright, trademark, privacy, publicity, or other rights. Just because content is freely available does not mean you are free to copy and sell it.
Public domain and other non-exclusive content
Some types of content, such as public domain content, may be free to use by anyone, or may be licensed for use by more than one party. We will not accept content that is freely available on the web unless you are the copyright owner of that content. For example, if you received your book content from a source that allows you and others to re-distribute it, and the content is freely available on the web, we will not accept it for sale on the Kindle store. We do accept public domain content but may choose not to sell a public domain book if its content is undifferentiated or barely differentiated from one or more other books. Also, we do not allow companion books based on copyrighted works (e.g., summaries, study guides, etc.) to be published outside the U.S. without written permission from the copyright holder.
Poor customer experience
We don't accept books that provide a poor customer experience. We reserve the right to determine whether content provides a poor customer experience. See the Guide to Kindle Content Quality
for examples of content that's typically disappointing to customers.