SAVE UP TO 90%: Shop Amazon's selection of Kindle e-books and score up to 90% off on select titles.

If you run through books like days of the week, it could be the perfect time to stock up on reading material for the summer. Amazon's got great deals on Kindle reads that might catch your eye today.

As of May 9, hundreds of Kindle e-books are marked down by as much as 90% at Amazon. You'll find discounted titles in genres like nonfiction, mystery, thriller, romance, sci-fi, and more ahead of the Amazon Book Sale, which kicks off May 15.

If you've exhausted your list of books to read or you feel like adding to your ever-expanding digital library, today is a great day for those who read Kindle editions of digital books. You can score epic discounts on hundreds of titles in every genre (children's books, cookbooks, biographies, novels, and more) from authors including Viola Davis, Meghan Quinn, Dean Koontz, David Sedaris, and many others. You can read Kindle editions through the Amazon Kindle app which works on compatible phones or tablets.

If you don't yet have an e-reader device, Mashable's favorite version is the Amazon Kindle Signature Edition, plus the Kindle Scribe is on sale for its lowest price ever today. But if you'd rather not snag a Kindle right now, you can still cash in on the deeply discounted books.

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There's something for every type of reader in today's Kindle book sale.