For years, authors have learned how to game the system, tweaking keywords, stacking categories, and driving short bursts of sales to climb the rankings on Amazon. But many of those techniques no longer work the way they used to, leaving authors wondering why their marketing efforts are falling flat and their visibility is slipping. The A10 algorithm has fundamentally changed how books are discovered and promoted on the platform.

In this week’s blog, Ginger breaks down what these changes really mean for authors and why they demand a new approach to positioning, marketing, and sustaining your books over time. Visibility is no longer about quick wins or clever tricks, but about aligning your book with real reader intent, improving conversion on your listings, and building consistent engagement that signals long term value. If you want your books to stay visible in 2026 and beyond, this is a shift you cannot afford to ignore.

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I’ve spent over a year focused on Direct Sales, and while it hasn’t been easy keeping things profitable, I’m not going to throw all my eggs back into the Amazon basket anytime soon. 

However, as a self-published author, you can’t ignore how powerful the world’s biggest bookstore remains, and even if you’ve turned your back on Amazon as your primary sales channel, that doesn’t mean it’s turned its back on you. 

Last month, for example, I ran an advertising campaign for my direct sales store. In addition to driving hundreds of Shopify sales, all that promotion for my books ended up driving an additional 100% increase in my Amazon sales, despite all my ads pointing to my own website!

So it’s worth keeping your books on Amazon in at least some capacity, even if it’s not the exclusivity of being part of Kindle Unlimited. It’s also worth keeping up with developments to the Amazon bookstore, because as a self-published author navigating Kindle Direct Publishing in 2026, you have a responsibility to maximize the visibility and sell-ability (is that a real word?) of your books.

And if you’ve been coasting along on Amazon, doing what you’ve always done, it might be time for a shift in tactics. 

That’s because in 2026, you’re facing a fundamentally smarter ranking system than the one you’re used to. It’s called the A10 algorithm—Amazon’s evolved search and recommendation engine—and it’s moved far beyond the old A9 model’s focus on simple keyword density and raw sales spikes. 

Today, visibility on Amazon requires a balance of sales velocity with conversion rates, and prioritizes reader engagement signals and heavily rewards genuine reader intent.

What does all that mean? It translates to Amazon prioritizing books that deliver real value to readers. Those books should rise faster and stay visible longer, while manipulative tactics previously used to artificially boost ranking and visibility are getting increasingly penalized. 

Here’s exactly how the change unfolded and what you should do to optimize your metadata, listings, and marketing:

The A10 Timeline: When and How the Algorithm Changed

Understanding the rollout helps explain why many authors saw ranking fluctuations in 2025 and why adaptation became urgent in 2026. You can read evidence of these changes direct from authors in a report about the A10 Algorithm published on selfpublishing.org.

• Early signals (2024–Q1 2025): Amazon began testing semantic improvements and greater emphasis on engagement metrics. Rufus (Amazon’s AI shopping assistant) gained prominence, pushing the platform toward natural language understanding over exact keyword matches. Authors noticed this when their books plummeted in the rankings despite consistent sales.  
• Initial rollout (Q1–Summer 2025): The A10 algorithm started phasing in during the first quarter of 2025, with noticeable effects by mid-year. Reports from indie authors and publishing outlets noted a de-emphasis on short-term launch spikes and internal ad-driven sales. By summer 2025, sustained reader engagement (dwell time, sample reads, and read-through rates) began carrying more weight.
• Full implementation (late 2025–early 2026): The transition completed across major categories by late 2025, becoming the dominant system in 2026. Bestseller rankings shifted to a rolling average (daily updates instead of hourly), and penalties for “unreadable” or keyword-stuffed titles became stricter via advanced Natural Language Processing (NLP).
• Ongoing refinements (2026 onward): Amazon continues fine-tuning A10 with AI-driven intent matching, making consistent performance and external traffic even more critical.

What does this mean for self-published authors? Mainly that the old playbook of heavy keyword repetition and artificial velocity no longer works, and can actively hurt visibility. A10 asks a deeper question: “Does this book truly satisfy what the searcher wants?”

Core Priorities of A10: Velocity, Conversion, and Engagement

Authors used to be able to reliably boost their visibility on Amazon by using advertising and promotion to send their books higher and higher in the rankings. The A10 algorithm still values that advertising-driven sales velocity, but it now weighs it against “quality signals” as well.

What exactly are “quality signals”? Well, here’s a good place to start:

• Conversion rates: How many page visitors actually buy after viewing your cover, description, and A+ Content.
• Reader engagement: How much time did ad-driven traffic spend on your detail page, “Look Inside” interactions, scroll depth on A+ modules, and post-purchase behavior (such as a low return rate, high Kindle Unlimited KENP page reads, and series read-through).
• Semantic relevance: Does your metadata match real buyer intent rather than just containing search terms? You can get a lot of visitors with popular search terms, but did that traffic translate into sales and engagement? 
• Steady performance over spikes: Consistent sales and external traffic signals matter more than one-day promo blasts. Amazon doesn’t want you to just sell a bunch of books. It wants you to keep selling a bunch of books even when you’re not actively advertising them.

Holistically, this approach matches Amazon’s persistently stated goals when talking about visibility on the digital bookshelves. Amazon prioritizes high-quality books that keep readers happy. Those books receive sustained visibility boosts, whereas low-effort or spammy listings get buried.

Titles and Subtitles: Readability First, NLP-Friendly Second

Just like everywhere else online, AI is making a big impact on Amazon. Amazon’s Natural Language Processing technology now flags book titles that sound robotic, awkwardly repetitive, or stuffed with search terms because they don’t read like normal human language. This helps Amazon prioritize readable, customer-friendly listings and can reduce visibility or cause issues for titles that fail the “human-sounding” test.

I don’t necessarily think this is a bad move, even if it hurts the techniques we used to use to title our books. Now, the algorithm reads your book title the way a person would, instead of scanning them for words that match what people are typing into the search bar.

Here’s how you can change your approach to titling books:

Actionable 2026 guidelines:

• Aim for 60–80 characters in the main title (critical for mobile previews).
• Write naturally, as if recommending the book to a friend: “Dragon’s Shadow: A Slow-Burn Romantasy Adventure” beats “Dragon Shifter Romance Slow Burn Fantasy Series Book Novel.”
• Use subtitles to clarify benefits or series position without stuffing.
• Avoid ALL CAPS, excessive punctuation, or promotional fluff like “#1 Bestseller.”

Test your title against Amazon’s autocomplete suggestions. If it reads awkwardly when spoken aloud (because many readers will be using voice search via Alexa or Rufus), revise it. Clean, intent-driven titles improve click-through rates and avoid algorithmic flags.

Backend Keywords: Seven Slots for Distinct Reader Intents

Within the Kindle Direct Publishing dashboard, you have seven keyword fields to help your book get seen during searches. We offer a free tool to help you organize these.

However, with the A10 algorithm, it appears that you should treat each keyword entry as a separate audience intent rather than a dumping ground for stuffing keywords. Here’s what I mean:

Optimization tips for A10:

• Use natural long-tail phrases (2–5 words) that real readers might search: “cozy mystery book club discussion questions,” “beginner keto recipes meal prep,” or “enemies to lovers romantasy series.”
• Avoid repeating words already strong in your title or subtitle.
• Skip generic fillers like “book” or “novel” unless they appear in actual searches.
• Focus on semantic variations that reflect different buyer motivations.

If you’re running Amazon ads, you should consider updating keywords every 60–90 days based on your advertising reports, signaling the keywords that get the most impressions and the highest CTR data. Tools like Publisher Rocket continue to be useful, revealing high-intent, lower-competition phrases that utilize your limited number of characters. Use this data to help Amazon confidently connect your book with ready-to-buy shoppers.

Descriptions, A+ Content, and Conversion Optimization

Your book blurb works almost as hard as your cover to get readers actually clicking the “Buy Now” button, and that hasn’t changed with this update. There’s no cheat, hack, or shortcut to writing a good blurb. It needs to prioritize hooking readers emotionally and weaving in natural search terms should never come at the expense of a blurb that reads well.

If you’re writing fiction, focus on the stakes. If you’re writing non-fiction, focus on the benefits. As always, pursue editorial and Amazon reviews to demonstrate “social proof” and let potential readers know that other people have enjoyed your book.

A+ Content has become non-negotiable in 2026. Rich modules (image-text combinations, comparison charts, excerpt highlights, author notes) can significantly lift conversion rates by answering objections and deepening engagement. Using A+ Content helps make your book look indistinguishable from the books published traditionally.

Here are some best practices:

• Use high-quality lifestyle or mood images.
• Include testimonial carousels or benefit breakdowns.
• Highlight “Look Inside” teasers.
• Track performance indirectly by examining your sales data.

A polished listing with strong A+ Content signals quality to A10, encouraging the algorithm to show your book more often to more potential readers.

Data-Driven Marketing: External Traffic and Sustained Velocity

While a lot of this sounds like it makes advertising and marketing less effective for getting your book seen, that’s not strictly true. The A10 algorithm rewards books that bring traffic from outside Amazon through external ads (like FB), email lists, social media, BookBub, TikTok, your own website, and being included in newsletters. Ironically, since Advertising on Amazon is a large part of their sales model, external sales now actually carry more ranking power because they prove you’re introducing new customers to the Amazon platform. That being said, you can’t ignore Advertising on Amazon because it can be vital in keeping your expensive external traffic looking at your books.

Practical strategies:

• Build and nurture an email list for consistent launch and backlist pushes.
• Run profitable Amazon Ads focused on intent keywords, but don’t rely on them alone.
• If you’re part of Kindle Unlimited, encourage KU reads and honest reviews to strengthen engagement signals. KU is a powerhouse for making Facebook ads profitable.
• Keep readers within your ecosystem. Use defensive advertising and backmatter material to cross-promote within your series or catalog to boost read-through rates.
• Regularly monitor your advertising data, looking at detail views, units sold, and KENP pagereads. If you have a low CTR, consider improving your covers and titles. If you have a poor conversion rate, strengthen your blurb and consider adding or updating your A+ Content.

Pitfalls to Avoid Under A10

So, I’ve given you some advice on how to optimize your books for the A10 algorithm. Now, here are some things you need to stop doing to avoid getting penalized.

• Firstly, stop keyword stuffing in any visible field. If a potential reader can see it, make sure it reads like a real, human-written sentence.
• Don’t use misleading categories or metadata to try and cheat the ranking systems. That can lead to poor reviews and suppressed rankings.
• You can’t afford to ignore mobile optimization any longer. Remember that most searches happen on phones, so view your Product Pages and make sure they look good on a tiny screen.
• You can’t rely on “one-and-done” launches any longer. You should plan for ongoing marketing of your books to maintain sales velocity and engagement.
• This one is important! If you choose to incorporate AI-generated content into your book catalog, make sure you are transparent about it. This isn’t just good marketing. It’s mandatory per KDP rules to maintain trust and compliance.

Your 2026 Action Plan

Okay, so if I’ve sold you on how significant the A10 algorithm will be to the visibility of your books on Amazon, you’re probably looking for a plan on how to update your books. Here’s a quick and easy action plan:

1. First, audit your current book listings. If you’ve used keywords a lot, consider rewriting the title/subtitle of your books for a more natural flow.
2. View your product pages on mobile, and shorten your titles and descriptions to avoid the hooks getting cut off with a “read more” prompt.
3. Visit the KDP dashboard and refresh the seven backend keywords for your books with more intent-focused long-tails. Use Publisher Rocket to check their search ranking.
4. Enhance and update your blurbs if appropriate, and fully utilize the A+ Content modules.
5. Use advertising and marketing to drive a continued flow of external traffic and track your advertising and sales results over the course of 4–6 weeks.
6. Iterate based on that data! Use impressions, CTR, and sales to validate small, consistent improvements. These will compound over time.

Amazon remains a massively important part of your author business, even if it’s no longer your priority sales channel. If you treat the KDP listings for your books as a living sales page—centered on providing reader satisfaction—you might find yourself thriving under the new A10 algorithm instead of being penalized by it. 

Nobody likes change, but in some ways this shift is a positive one. Amazon no longer rewards authors for “gaming the system.” It’s one step closer to rewarding books that genuinely connect with readers and deliver on the promises their authors make.

In today’s saturated self-publishing market, cracking the 2026 Amazon KDP algorithm means aligning your metadata, presentation, and marketing to real reader intent and sustained performance, but it will help make your books deliver greater value for greater length of time, reducing the pressure to keep publishing rather than publish what you’re proud of. 

So, open your KDP bookshelf today and make one meaningful update today! The authors who adapt quickest will be the ones to claim the top spots in search results throughout this year and beyond.

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