Until September 15, you can sign up for three months of Kindle Unlimited for just $11.99. Regularly $35,97, Kindle Unlimited is Amazon's subscription service for e-books. This deal not only gets you three months for the price of one, but also access to over four million titles, thousands of audiobooks, and select digital magazines.

Amazon is celebrating the 10th anniversary of Kindle Unlimited by adding exclusive titles available for a limited time, offering exciting deals for current and new members, and unveiling its all-time top titles.

Kindle Unlimited members can get additional months of the service for free, while new members can get 3 months for the price of 1.