The Strategic Author's Guide to Amazon's Kindle Unlimited
by Penny C. Sansevieri
Many authors struggle with the decision of whether to enroll their books in Kindle Unlimited (KU), Amazon's subscription reading program. This choice can significantly impact your book's reach, revenue potential, and marketing effectiveness—but the right answer varies widely depending on your specific circumstances.
During a recent podcast episode, we discussed this topic. Understanding the fundamental differences between Kindle Direct Publishing (KDP) and Kindle Unlimited is the first crucial step.
Kindle Direct Publishing (KDP) vs Kindle Unlimited
One of the most common misconceptions we encounter is authors believing that publishing through KDP automatically enrolls them in Kindle Unlimited. This is absolutely not the case.
KDP is simply Amazon's publishing portal—the platform through which you upload and sell your books on Amazon. You can use KDP to distribute your book on Amazon without any exclusivity requirements.
Kindle Unlimited, however, is an entirely separate program that demands ebook exclusivity in exchange for inclusion in Amazon's subscription service where readers pay a monthly fee for unlimited reading.
The Exclusivity Requirement
The exclusivity requirement only applies to your ebook—not your print editions or audiobooks. This means you can still sell physical copies of your book everywhere while keeping your ebook exclusive to Amazon.
When enrolled in Kindle Unlimited, authors earn money based on pages read rather than a flat fee per download. The payment rate fluctuates monthly based on the KDP Select Global Fund, typically ranging around half a cent per page, though this can vary.
Genre Considerations
Genre considerations play a significant role in determining whether Kindle Unlimited makes sense for your book. Romance, mystery, thriller, and other genre fiction categories tend to perform exceptionally well in the program. This is largely because readers of these genres are often voracious consumers who read multiple books per month, making Kindle Unlimited's subscription model particularly appealing to them.
Business books and certain non-fiction categories might see less benefit since their readers are typically willing to purchase individual titles and read at a slower pace.
Compelling Reason for Kindle Unlimited
Perhaps the most compelling reason many authors choose Kindle Unlimited is its impact on Amazon advertising effectiveness.
We've consistently observed that Amazon ads perform significantly better for books enrolled in Kindle Unlimited, especially in those genres already well-represented in the program.
This improved ad performance happens because Kindle Unlimited subscribers view these books as "free" within their subscription, removing a significant barrier to trying a new author or title.
One Strategic Approach
One strategic approach many series authors employ is putting only their first book in a series into Kindle Unlimited as a reader acquisition tool. This allows them to capitalize on the increased visibility and lower barrier to entry for new readers, while still selling subsequent books in the series across all platforms.
Some authors also delay enrolling new releases in Kindle Unlimited, focusing first on maximizing direct sales before later transitioning to the subscription model to extend the book's commercial lifespan.
Final Thought
Remember that Kindle Unlimited enrollment runs in 90-day periods.
While you can set it to auto-renew indefinitely, many authors prefer to manually evaluate performance at each renewal opportunity. This gives you the flexibility to adapt your strategy based on actual results rather than committing indefinitely.
Most importantly, don't view Kindle Unlimited as a magic solution for books that aren't selling.
If your book isn't performing well overall, exclusivity alone won't solve fundamental marketing or positioning issues.
Do you have books in Kindle Unlimited? Why or why not? And do you subscribe to KU? Again, why or why not? Feel free to to ask me any questions down in the comments!
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About Penny
Penny C. Sansevieri, is a powerhouse in the publishing industry. As the Founder and CEO of Author Marketing Experts, Inc., she has revolutionized book marketing, shaping the careers of authors and guiding them to bestseller status. Penny's influence is undeniable—named one of New York Metropolitan Magazine's Top Influencers of 2019, she's known for her cutting-edge Amazon campaigns and innovative strategies that catapult exceptional books onto bestseller lists. She is also the author of 24 books. To learn more about how Penny can help you amplify your book’s exposure, visit her website at: www.amarketingexpert.com
Tune into her podcast at: www.amarketingexpert.com/podcast
Top featured photo purchased from Depositphotos.
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16 comments on “The Strategic Author's Guide to Amazon's Kindle Unlimited”
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Excellent article, like all on WITS. I've been debating putting my first book (of a series of three spy thrillers) on KU - I've had it "conventionally" on Kindle for 2 years, and the sequels for 15 and 9 months respectively. The books have won prizes and sold more than 1000 copies each. I joined KU as a reader about six months ago just to get the feel of it, and I confess that I've been disappointed as most (not all) of the books I've downloaded have poor writing, derivative plots and characters - and I suspect quite a few have been at least partly written using AI. So, books that I wouldn't review as anything I'd write would insult the author. I suppose I therefore have something of a superiority complex - not wanting to put my own books into a platform full of dross. BUT - should I care? Does it matter? I imagine most people who subscribe to KU won't actually buy books as well, and (like me) simply stop if they don't like the book. Has anyone else out there felt like me and gone ahead anyway with KU and been successful?
Thanks for commenting, Oliver, and for visiting us here at WITS. It sounds like you would actually be a star on KU if you are putting out a high quality of product.
I don't know how spy thrillers do on KU - I'll give Penny a heads up to pop in with that intel, but I read tons of romance and women's fiction on KU. It's saved me a ton of money over the years, and I love it. Part of what I love is that I can try an author as part of the subscription. If I love them, I can turn around and happily start buying their books.
Oliver hi!
So you make a good point. Not everyone on KU is a rockstar and, for that matter, the same is true for non-KU authors. But genre fiction does very well there - and in fact running ads for a genre fiction book without the KU link can be a struggle because so many of the readers get their books via KU. But I will say, I've been a subscriber of KU for a long time and while not every book has been great, I haven't seen the kind of issues you're mentioning - maybe I've just been lucky? But yes, you do run the chance of someone not finishing your book! Hope that helps!
Great post!
My UF series does really well in KU. It’s a great program if your books fall into one of the genres that has a strong presence. I never thought about only placing the first book in the series in KU and the others out of it. I may have to give that a try when my 90 days are up.
I liked that piece of advice too, Jenn. I'll be interested to hear whether that makes you the same amount across your series as having them all in KU.
I've considered moving my first Sci-Fi novel (part of a tetralogy) to KU, so appreciate this article, but have had reservations. This article confirms pretty much what I've suspected all along. So, I can't say it's moved me any closer toward pushing that button. The biggest mistake I made as an aspiring "commercial" author is to release my first book through Kindle before having any marketing plan or platform ready. I only sent out twelve queries, then caved in to friends and relatives who kept asking "when is your book coming out?"
Ego had a small part, too, but it was a rookie mistake. It meant most potential agents and publishers wouldn't touch it or any of its sequels. I'm taking a much more aggressive stance on my second novel, getting serious about querying and platform before I'll ever consider releasing it on KP. I've put too much work into it and know it's good–even if it fits into a narrower niche, fan-wise.
Good for you, getting your plan in place in advance this time, Jerold. That's so hard. I know several new authors who have done the same and had the metaphorical bruises to show for it.
Great summary of the challenges and advantages with KU, Penny! Thanks. I don't have any in KU. I did have a couple of client books that were in KU, but for our genres we found that we did better wide.
I know authors who do much better in KU, too. So it is definitely nuanced! You laid it out well.
I'm right there with you, Lisa. I really liked having things broken down so clearly.
🙂 🙂
Thanks so much! I appreciate the feedback!
wonderful information
I'll probably upsetsome people, but... A Hard NO here. I want all my books, including my perma-free first in series books, available to as many readers as possible, not just those tied to the Zon. I don't believe in exclusivity, and--sorry--I buy my books from Barnes & Noble, and never from KU. My attitude is if there's ONE reader who wants my book, they should be able to get it wherever they prefer to shop. Also, Kindles aren't the main e-readers in other countries. I can't count how many international readers I have via Kobo.
I don't think that will upset anyone, Terry, and I appreciate that you shared. I love knowing you have a strong international base via Kobo.
I don't have books in Kindle Unlimited and I don't subscribe to it, but this article has made me think about putting Book One of a three book picture book series in it. Just thinking, though, that with 24 pages of text and illustrations and about half a cent per page, it may take forever to earn anything. I'll test it and see how it does. Can't hurt for 90 days. Thanks for the article!
Thanks for visiting, Karen!
You're welcome, Karen and best of luck!