Free Select Kindle eBook with eMail Sign-Up to Kindle Delivers Daily Deals

Until May 31, 2013, first-time subscribers to the Kindle Delivers Daily Deals e-mail qualify for a promotional credit to get one selected Kindle book for free (book selection below).
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branie May 01, 2013
Cool promo, I will forward this around, thanks.
naturaldeal May 01, 2013
Any of them is free? If my choice?