Amazon Ads for Books: A Beginner's Guide to Sponsored Products

How to run Amazon Sponsored Product ads for your books: campaign types, keyword targeting, bidding basics, budgeting, and how to read your ad reports.

Amazon ads for books are one of the most direct ways for indie authors to reach readers at the moment they're actively searching for something to buy. Unlike social media advertising, where you're trying to interrupt someone's feed to make them think about books, Amazon ads reach people who are already on a book-buying platform — often with a specific genre or topic in mind. That context makes Amazon advertising unusually effective for authors when it's set up correctly.

The platform has a learning curve. Amazon Ads operates separately from KDP, has its own interface and terminology, and requires monitoring to avoid burning through budget on unproductive placements. But the fundamentals aren't complicated once you understand the structure. This guide explains how the system works, how to set up your first campaign, and how to read your results to improve over time.

What Amazon Ads are and why authors use them

Amazon Ads (accessed through ads.amazon.com) places your book in front of shoppers on Amazon.com in two primary contexts: search results and product pages. When someone searches "cozy mystery new release" and your ad matches their query, your book appears in the results. When someone is browsing a competitor book's page, your book can appear as a sponsored recommendation.

The key advantage for authors is purchase intent. Amazon shoppers are not passively browsing — they're actively looking for products to buy. When your ad reaches a reader who is searching for a book in your genre, the gap between discovery and purchase is very short. This distinguishes Amazon Ads from platforms like Facebook or Instagram, where reaching readers requires interrupting their browsing with advertising rather than appearing within their active search.

Ad types available for books

Amazon offers three ad formats relevant to authors. Not all of them are available to every seller.

Sponsored Products are the most common and most important ad type for indie authors. These ads appear in Amazon's search results and on product detail pages (typically under "Sponsored products related to this item"). They're available to all KDP authors and can run on both print books and Kindle ebooks.

Sponsored Brands display a banner with your logo, a custom headline, and multiple book listings. They appear at the top of search results. Sponsored Brands require Brand Registry enrollment, which is primarily available to publishers and businesses with registered trademarks. Most individual indie authors don't have access to this format.

Lockscreen Ads appear on Kindle e-readers' lock screens and are only available for ebooks (not print). They're an ebook-specific format that can work well for genre fiction but requires KDP enrollment and runs through the Amazon Ads console.

Ad type	Placement	Cost model	Who can use	Best for
Sponsored Products	Search results, product pages	CPC	All KDP authors	Most indie authors — start here
Sponsored Brands	Top of search results banner	CPC	Brand Registry required	Publishers, businesses with trademark
Lockscreen Ads	Kindle device lock screen	CPM or CPC	KDP ebook authors	Ebook genre fiction

For this guide, the focus is on Sponsored Products — the ad type every indie author can use from day one.

Setting up your first Sponsored Products campaign

Step 1: Access Amazon Ads

Amazon Ads is a separate platform from KDP. Go to ads.amazon.com and sign in with your Amazon account. Connect your KDP books to your Ads account during setup. Once connected, your book catalog will be available to use as the advertised product.

Step 2: Choose campaign settings

When creating a new campaign:

Campaign name: Use a naming convention that includes the book title and targeting type for easy tracking later (e.g., "Midnight Harvest — Auto" or "Midnight Harvest — Manual KW").
Daily budget: Start with $5–$10/day as a new advertiser. This limits your risk while you gather data.
Start and end date: Set a start date. Leave the end date open unless you're running a timed promotion.
Targeting type: Choose Automatic or Manual (see Step 3).

Step 3: Choose your targeting — automatic vs. manual

This is the most important decision in campaign setup.

Automatic targeting lets Amazon choose which search terms and product pages to show your ad on, based on your book's metadata. It's easy to set up, and it's useful for discovering which keywords and products drive clicks and purchases. However, it's less precise and can burn through budget on irrelevant placements if not monitored.

Manual targeting requires you to specify the exact keywords or products you want to target. It gives you full control and typically produces better results once you know which terms are working — but requires more knowledge upfront.

The best approach for beginners: Start with an automatic campaign for 2–4 weeks to generate data. Review which search terms produced clicks and sales. Then create a manual campaign using the best-performing terms from the auto campaign.

Step 4: Keyword targeting in manual campaigns

In a manual keyword targeting campaign, you choose specific search terms and set bids for each. Amazon offers three match types:

Broad match: Your ad can appear when the search includes your keyword in any order, along with other terms. Highest reach, least precision. Example: keyword "cozy mystery" matches searches like "cozy mystery 2026" or "funny cozy mystery."
Phrase match: Your ad appears when the search contains your keyword as a phrase. More precise than broad. Example: "cozy mystery" matches "best cozy mystery books" but not "mystery cozy."
Exact match: Your ad only appears when the search exactly matches your keyword. Most precise, lowest volume. Example: "cozy mystery" only matches exactly that query.

Start with broad and phrase match to build data, then shift budget toward exact match on terms that convert.

When selecting keywords, think like a reader searching for your book. Target:

Genre terms ("historical romance novel," "hard sci-fi thriller")
Comparable author names ("books like Agatha Christie")
Series names or tropes specific to your genre ("enemies to lovers romance," "cozy cat mystery")

Step 5: Product targeting

In addition to keyword targeting, manual campaigns can also use product targeting — showing your ad on specific competitor book pages or entire category pages. This is powerful because it places your book in front of readers who are actively engaging with similar books.

To set up product targeting:

Search for comparable books by ASIN or title and add them to your target list
Or target entire Amazon categories to reach readers browsing a category page

Product targeting tends to work best when you're targeting books with similar readership — same genre, same tone, overlapping audience. Target the books readers of your genre are most likely to have bought or be browsing.

Step 6: Setting bids

Your bid is the maximum you're willing to pay per click. Amazon runs an auction — if your bid is competitive for a given search term or product page, your ad shows; if not, it doesn't.

When starting out:

Use Amazon's suggested bid as a starting reference (shown in the campaign builder)
Begin conservatively — 10–15% below the suggested bid
Increase bids on terms that are generating sales; decrease or pause terms that generate clicks but no sales

Don't over-bid early. You need data before you can confidently evaluate which placements justify higher bids.

Understanding your ad reports

The Amazon Ads dashboard provides a range of performance data. Here are the metrics that matter most:

Metric	What it means
Impressions	How many times your ad was shown
Clicks	How many times someone clicked your ad
CTR (Click-through rate)	Clicks ÷ Impressions. Shows how compelling your cover and title are at generating clicks.
Spend	Total amount paid for clicks in a given period
Orders	Number of book purchases attributed to your ad
Sales	Total revenue from those purchases
ACOS	Advertising Cost of Sales — ad spend ÷ ad revenue × 100

Review your reports weekly when starting out. Pay particular attention to the Search Term Report (under Reports → Sponsored Products), which shows exactly what search terms triggered your automatic campaign. This is where you find gems to move to manual campaigns and poor performers to exclude with negative keywords.

ACOS: what it is and what's "good" for books

ACOS (Advertising Cost of Sales) is your key efficiency metric. It tells you what percentage of your book revenue went to advertising.

ACOS = (Ad Spend ÷ Ad Revenue) × 100

If you spent $50 on ads and earned $100 in royalties from those ads, your ACOS is 50%.

What's a "good" ACOS depends on your royalty margin. For a Kindle book priced at $4.99 earning the 70% royalty (~$3.50), you want your ad cost per sale to be well below $3.50. If your ACOS is 40% and your royalty rate is 70%, you're profitable on ads alone. If ACOS is 70%+ and your royalty rate is 35% (print or international markets), you're losing money per sale.

ACOS also looks different depending on your strategy. If you're running book one of a series at $0.99 as a reader-acquisition tool — expecting revenue from books 2–4 — a high or even unprofitable ACOS on book one can still be a good investment. This is called total read-through ACOS and requires tracking your series revenue holistically.

For standalone books with no series, aim for an ACOS below your royalty percentage. For series entry points, your acceptable ACOS is higher.

Starting budget recommendations

For a new advertiser with no data:

Start with $5–$10/day per campaign
Run for at least 2–4 weeks before drawing conclusions
Expect the first month to be a learning investment, not a profit center

Scale budgets incrementally. Once you've identified keywords with a good ACOS, increase their bids and budgets. Keep lower-performing campaigns at minimum budgets or pause them.

Don't start with a large daily budget before you have data. High spending on unoptimized campaigns wastes money; controlled early spending generates the data you need to improve.

Common Amazon Ads mistakes

Running only automatic campaigns indefinitely. Auto campaigns are useful for discovery but are rarely as efficient as well-built manual campaigns. Use auto campaigns to find what works, then build manual campaigns around those learnings.

Ignoring the Search Term Report. The search term report is one of the most valuable things Amazon Ads provides. Not reviewing it means you're missing opportunities to cut wasted spend and find new keyword targets.

Pausing campaigns too quickly. Amazon Ads take time to optimize. Judging a campaign's performance after a few days or a few dozen clicks produces unreliable data. Give campaigns 2–4 weeks before making significant changes.

Not using negative keywords. When your auto campaign shows your book for irrelevant queries (wrong genre, wrong audience), adding negative keywords stops future impressions on those terms and reduces wasted spend.

Setting unrealistic ACOS targets on series entry points. Optimizing for ACOS on book one of a series without accounting for series revenue leads to underinvestment in a strategy that may actually be working.

When Amazon Ads make sense vs. when they don't

Situation	Verdict
Book is professionally formatted with strong cover	Good candidate for ads
Book has fewer than 10 reviews	Wait — improve social proof first
Running ads on book 1 of a series with strong read-through	Strong use case
Running ads on a standalone book with thin margins	Be cautious — track ACOS tightly
Using ads during a price promotion or BookBub deal	Effective for amplifying peak traffic
Using ads as a substitute for a bad cover or blurb	Not effective — fix the conversion issue first

If your product page isn't converting (poor cover, weak blurb, low reviews), sending paid traffic to it wastes money. Ads amplify what's already working. Get the product page right — see how to write a book blurb — before you run significant ad spend.

Frequently asked questions

How much should I spend on Amazon Ads? Start with $5–$10 per day and scale based on results. A common monthly starting budget for authors new to Amazon Ads is $100–$200 as a learning investment. Increase your budget once you have campaigns with an acceptable ACOS.

How long before I see results? Meaningful data typically takes 2–4 weeks to accumulate. Expect the first few weeks to be slower as your campaigns build history and Amazon's algorithm optimizes your placement. Don't make major changes in the first two weeks.

Do Amazon Ads work for print books? Yes. Sponsored Products can run on paperback and hardcover ASINs, not just Kindle editions. Print books appear in the same search results and product page placements. ACOS calculations differ because print royalty margins are lower than digital, so monitor profitability carefully.

Do I need a large catalog for Amazon Ads to be worth it? Not necessarily. A single well-formatted book with a strong cover, good reviews, and a clear genre can produce profitable ads. However, authors with series or multiple books in the same genre typically see better overall ROI because they can capture more value from each new reader.

Can I run Amazon Ads while enrolled in KDP Select? Yes. KDP Select enrollment and Amazon Ads are independent. You can run ads on KDP Select titles without any conflict. For a full comparison of distribution strategies, see the going wide vs. KDP Select guide.

The bottom line

Amazon Ads are one of the most accessible paid marketing channels for indie authors — you don't need a large following, a platform, or external accounts. You need a book that's ready to convert visitors (strong cover, blurb, reviews), a starting budget to gather data, and the patience to let campaigns run long enough to learn from them.

Start with automatic campaigns, review your Search Term Reports weekly, and build manual campaigns around what the data shows is working. It takes time, but the compounding effect of well-optimized campaigns can produce consistent, scalable book sales over the long term. Get started with LiberScript to make sure your book files are professionally formatted and ready for Amazon's platform.