There are relatively few books of suttas available from the Amazon Kindle store, other than those by Wisdom Publications (shown on the main e-book page here). Below are a few other commercial books for the Kindle. Just search for the titles at amazon.com. As with all of the book recommendations on ReadingFaithfully.org, they are based on the accuracy of the translation, not on opinions expressed by the translator.
- The Dhammapada: A New Translation of the Buddhist Classic with Annotations, by Gil Fronsdal.
- Sayings of the Buddha : New translations from the Pali Nikayas (Oxford World’s Classics) by Rupert Gethin
Be sure to check out the main e-book page here for lots of other sutta books, many of them free.