Fees
You may not charge users any fee for the use of your application, unless you have entered into a separate agreement with Google or obtained Google's written permission.
Content Removal
You must remove from your site or application any content provided through the Books API that is alleged to infringe the rights of third parties to the extent required by applicable law or upon request from Google. You also will provide contact information that rights holders can use to contact you and request removals.
Privacy
You must notify users of your websites and applications that any content they submit through the Books API, including their name or nicknames, may be made publicly available on Google services as described by the Books Privacy Policy at https://books.google.com/googlebooks/privacy.html and Help Center article at https://support.google.com/books/bin/answer.py?hl=en&answer=100088.
Terms of Service
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