How to Run Amazon Ads for Books (2026 Beginner to Profitable Guide)

What types of Amazon Ads can authors run?

Most authors use two formats. Sponsored Products ads appear in search results and on other book pages, and they can target keywords, specific products or categories. They are where most authors start and where most book ad spend goes, because they are simple and give clear data.

Sponsored Brands ads show a custom headline alongside several of your books, so they suit series and authors with a backlist. Other formats, including display-style ads and ads on other platforms, may be available depending on your account, your book formats and your marketplace.

Availability differs by country and by whether you advertise ebooks, paperbacks or both. Begin with Sponsored Products, learn what your book responds to, then expand once you have data rather than guesses.

What should you fix before spending a penny?

An ad only buys a click. The sale happens on your book page, so the cover, blurb, price, reviews and the first pages of the Look Inside preview do the converting. If readers land on a page that looks unlike the bestsellers in your genre, extra spend simply buys more people leaving.

Check three things first. Does the cover signal the right genre at thumbnail size? Does the blurb hook in the first two lines? Is the price in line with similar books? If you are unsure about the blurb, our guide on writing a blurb is a good place to start.

Also be honest about the book itself. Ads work best on a finished, well-edited book with a clear genre and, ideally, further books in a series. A single standalone book with a low royalty has less room to be profitable, and that is worth knowing before you start.

How do you set up your first campaign?

Start with one Sponsored Products campaign for one book. Choose manual targeting so you control exactly what you bid on, set a modest daily budget, and give the campaign a clear name that includes the book and the target type. Tidy naming saves a lot of confusion when you have ten campaigns.

Many authors also run one automatic campaign alongside, because Amazon will find search terms and products you had not thought of. Treat it as a research tool: review its search term report, move the terms that sell into your manual campaigns, and add the ones that waste money as negatives.

Write a short, concrete line of ad copy where the format allows it. Lead with the reader promise or the genre and trope signal, and keep it plain. The Amazon Ad Copy Generator can give you starting drafts, but read each one against your actual book so it makes no promise the story does not keep.

How do you choose keywords, targets and bids?

The strongest targets are usually the books and authors your ideal reader already buys. A thriller reader viewing a bestselling thriller is a far better prospect than someone typing a broad word like “book”. Build a list of comparable titles and author names in your exact subgenre; the Comp Title Finder can help you start.

Add specific keyword phrases readers really type, such as “enemies to lovers fantasy romance” or “cozy cat mystery series”, rather than single broad words. Our guide on KDP keywords and categories covers how to research them, and the KDP Keyword Generator can widen your list.

For bids, start near the suggested range shown in the console, then adjust from your own results. Very low bids may get no impressions, while very high bids on broad terms burn budget. Separate campaigns for keywords, book targets and automatic targeting let you see which approach actually earns.

What is ACOS and what is a good number?

ACOS, advertising cost of sale, is ad spend divided by the sales those ads generated, shown as a percentage. Spend $10 and generate $40 in sales and your ACOS is 25%. Note that it compares spend with sales revenue, not with your royalty.

That distinction matters. Your break-even ACOS equals your royalty as a share of the price. A book earning a 70% royalty breaks even near 70% ACOS on that book alone, but a 35% royalty breaks even near 35%. Paperbacks are lower still once printing costs are taken out, so work out your real figure with the Amazon Ads ACoS Calculator and the KDP Royalty Calculator before judging results.

For a series, a higher ACOS on book one can still be profitable, because many readers go on to buy later books without further ad spend. Judge ads by total earnings across the series, not only the advertised book. Kindle Unlimited page reads also add income that ACOS does not show, so include them when you assess a campaign.

How do you optimise campaigns over time?

Do not judge a campaign in its first few days. Give it a couple of weeks and enough clicks to mean something before you cut or scale. Then check weekly rather than hourly, because daily sales swing for reasons that have nothing to do with your settings.

Each review, do four things. Lower bids on targets with plenty of clicks and no sales. Nudge bids up on targets that sell profitably. Copy search terms that produced sales into exact-match keywords. Add negative keywords for searches that attract the wrong readers.

• Lots of impressions but few clicks: the cover or targeting is weak, so test a new cover or tighter targets.
• Plenty of clicks but few sales: the page is the problem, so revisit the blurb, price and reviews.
• Sales but a high ACOS: lower bids, or accept it if later books in the series pay it back.

Over a few months this steady pruning and reinvesting is what turns a broad, losing campaign into a lean one that reliably sells books. If you are planning a launch, fit your ad tests into your wider plan using the book launch checklist.

Frequently asked questions

Are Amazon Ads worth it for authors?

They can be, especially for series and genre fiction, but only with a strong cover, blurb, reviews and a fair price, and with regular optimisation.

How much should I spend on Amazon Ads?

Start with a small daily budget you can afford to lose, and judge results over a couple of weeks. Minimums and suggested bids change, so check your console.

What is a good ACOS for books?

Below your break-even ACOS, which is roughly your royalty share of the price, is profitable on that book. For a series, a higher ACOS on book one can still pay off.

Should I target keywords or other books?

Both, in separate campaigns. Targeting comparable books and authors in your subgenre is often the strongest starting point.

Why are my ads getting impressions but no sales?

Usually the listing is the problem: cover, blurb, price or reviews. Fix the listing before increasing ad spend.