If you're an avid audiobook listener, an Audible Premium Plus subscription is tough to beat. This membership gives you access to a vast library of audiobooks and includes a monthly credit to purchase any audiobook to keep forever. It's a no-brainer for enthusiasts at just $14.95/month, but currently, you can get three months of service for only $0.99/month. That means you're essentially paying $3 for three audiobooks, as you'll receive three credits during the promotional period. This deal is quite attractive, and since it runs until December 31, you have ample time to take advantage of it.

In addition to your monthly free credit, Audible Premium Plus members can purchase extra credits for $15 each. This allows you to buy any audiobook in the catalog for just $15—perfect if you have a long wishlist of titles priced above $15. Remember, your membership will auto-renew at $14.95/month after the three-month promotional period, so make sure to cancel if you don't plan to continue.

If you prefer ebooks over audiobooks, Kindle Unlimited offers a similar promotion. New customers can enjoy three months of the service for free. Along with access to millions of digital books, members also get a small selection of audiobooks. While not as extensive as Audible's offerings, it's a nice perk considering the initial cost is $0. Like Audible, your plan will automatically renew at $12/month after the free trial, so cancel in advance if you're only interested in the trial.

Don't forget, Amazon Prime members have a lot to look forward to with the upcoming Amazon Prime Big Deal Days sale on October 8 and 9. The two-day event will feature significant discounts on video games, electronics, Blu-rays, and more, with some early deals already available for Prime members.