KDP advertising runs on Amazon Ads, not inside KDP. The links on your KDP Bookshelf are entry points; the campaign is built, funded, and reported in the Amazon Ads console. Three ad types are associated with books, and they do not share the same door. Sponsored Products is open to an author with one published title — Amazon lists “professional sellers, vendors, book vendors, Kindle Direct Publishing (KDP) authors, and agencies” as eligible advertisers. Sponsored Brands is gated: “To create a Sponsored Brands campaign, you must add at least one pen name with three unique titles to your Author Central account” (KDP Help, data checked 2026-08-22). Kindle lockscreen ads are a third, separate thing — bought through Amazon DSP, not through the Sponsored Ads console.
That three-title rule is the detail most walkthroughs skip, and it explains a common dead end: an author reads about the headline-style book ad, opens the console, and cannot select it. This guide separates the three ad types, states the documented eligibility condition for each, maps which of the three consoles — KDP, Author Central, Amazon Ads — owns which job, and gives Amazon’s published cost model in its own words.
The three ad types associated with books
Sponsored Products is the format almost every author starts with. Amazon describes them as ads “which appear in shopping results and on product detail pages, directing shoppers to your book’s detail page once clicked” (KDP Help, data checked 2026-08-22). They run on a cost-per-click basis and offer two targeting modes: “You select products to advertise and choose keywords to target, or let Amazon’s systems target relevant keywords automatically” (Amazon Ads, data checked 2026-08-22) — the manual and automatic modes respectively.
Sponsored Brands is the multi-book format. Amazon’s own framing is that it “enables you to showcase a selection of your books and aid discovery of you as an author, or to run eye-catching video ads that direct shoppers to a detail page” (KDP Help, data checked 2026-08-22). It carries the three-title condition covered below.
Kindle lockscreen ads are the placement on Kindle E-reader lockscreens. Here the picture is different from what most summaries suggest: as of an Amazon Ads announcement dated 24 April 2026, “Kindle eReader lockscreen ads are now available through Amazon DSP,” and “advertisers can access Kindle lockscreen placement via self-service open auction,” listed for the United States (data checked 2026-08-22). That is a different buying route from Sponsored Products and Sponsored Brands, which are bought in the Sponsored Ads console.
Two honest limits on this last one. First, neither the Amazon Ads guide for authors nor the KDP help topic on advertising mentioned lockscreen ads at all when both were read on 2026-08-22 — the format is documented elsewhere, not in the author-facing pages. Second, no official page giving lockscreen bid minimums, creative specs, or budget rules could be retrieved on that date, so this guide gives none. If you are a one-book author, this is not where to start regardless; see the Amazon DSP guide for what that buying route involves.
Eligibility: the rule that stops most first-time authors
The formats are not equally open, and the difference is not a spend threshold.
| Ad type | Documented requirement (checked 2026-08-22) | Practical consequence |
|---|---|---|
| Sponsored Products | Eligible advertisers include KDP authors and book vendors | Available from your first published title |
| Sponsored Brands | At least one pen name with three unique titles added to your Author Central account | A one- or two-title author cannot select it — but Amazon’s own pages disagree on this, see below |
| Kindle lockscreen | Bought through Amazon DSP; listed for the United States | Not part of the author self-serve Sponsored Ads flow |
The Sponsored Brands condition catches people because it has two halves and most retellings drop the second. The Amazon Ads guide for authors states it as titles: the format is “for authors who have three or more unique eligible titles under the same author’s name.” The KDP help topic states it as an account action: you “must add at least one pen name with three unique titles to your Author Central account.” So publishing a third book is necessary but not sufficient — the three titles have to be claimed under a pen name in Author Central before the option becomes available. An author who has published four books and never finished Author Central setup will still be locked out, and nothing in the ads console explains why.
One official contradiction is worth knowing before you plan around this gate. An Amazon Ads launch announcement dated 6 June 2025, titled “Sponsored Brands: Now available for Single-Book Authors,” states that “Sponsored Brands is now available to all authors, including those with a single title,” and lists the US, Canada, Mexico, the UK, Germany, Spain, Italy, France, the Netherlands, Australia, India, and Japan. Both author-facing guides read on the same date still carry the three-title requirement — “You must have three or more eligible book titles claimed under the same author’s name.” Amazon has not reconciled the two pages (all three pages read in their English (en-US) versions, data checked 2026-08-22). Plan on the three-title gate as the safer assumption, but if you have one title it costs nothing to open the console and see whether the format is selectable for your account.
That makes Author Central a prerequisite for advertising, not just a marketing nicety. If yours is not set up, start with the Amazon Author Page guide and come back.
Sponsored Products has a marketplace boundary rather than a catalog one. Per KDP Help on 2026-08-22, it covers books published through KDP, co-authored books, and books published outside of KDP, in the US, Canada, Mexico, UK, Germany, Italy, Spain, France, Netherlands, India, Australia, and Japan.
Where you actually build them: three consoles, one destination
Authors deal with three interfaces, and the confusion is that all three mention advertising while only one creates a campaign.
KDP (kdp.amazon.com) owns the book. The documented route: sign in to KDP, select the book you want to advertise from your KDP Bookshelf, and click promote and advertise. Under Launch a Sponsored Products campaign, choose a marketplace and click Go to Campaign Builder (Amazon Ads guide for authors, data checked 2026-08-22). Note what that last click does — it hands you off.
Author Central (author.amazon.com) owns the author. It holds your author page, your bibliography, and the pen-name claims that gate Sponsored Brands. The documented route from here: click the Reports and marketing tab, pick your country in the Amazon Ads tile drop-down, then click Go to ads console (same source, same date).
Amazon Ads (advertising.amazon.com) owns the campaign. Budgets, bids, targeting, negative keywords, reporting, and billing all live here. Both routes above terminate in this console, and you can reach it directly without passing through either.
The practical reading: use KDP to decide which book to advertise, use Author Central to establish the author identity that unlocks the second format, and expect to spend your working hours in Amazon Ads.
Authors do not use Seller Central
Worth stating plainly, because most Amazon advertising material on the web is written for physical-product sellers, who manage campaigns from Seller Central. Authors publishing through KDP do not open a Seller Central account for this, and none of the seller-side scaffolding — brand registry, listing-level bulk operations, the seller campaign manager — is where an author begins.
The strategy layer still transfers. Match types, negative keywords, search-term harvesting, and the discipline of judging a campaign by return rather than impressions are the same craft; the Amazon PPC strategy playbook covers that layer, and the translation an author has to make is that the console is Amazon Ads reached from KDP or Author Central, not Campaign Manager reached from Seller Central. The economics differ more than the mechanics: a seller optimises against a product margin, an author against a royalty per sale, which is usually a much thinner number. The KDP royalty calculator comparison has the math that sets your ceiling, and the ACoS guide explains the ratio you will be judging campaigns by once you have one.
What Amazon charges for KDP advertising
There is no subscription and no minimum commitment. In Amazon’s wording: “Sponsored Products campaigns have no monthly or upfront fees,” and “There’s no up-front charge for a Sponsored Products ad. Rather, the author sets their budget and only pays when a shopper clicks on the ad” (Amazon Ads, data checked 2026-08-22). The model is stated the same way for authors specifically: “Amazon Ads uses a cost-per-click model, meaning authors only pay when a shopper clicks on their ad.”
Two numbers control spend.
Bid. “A bid is the maximum amount you are willing to pay when a customer clicks an ad” (Amazon Ads, data checked 2026-08-22). It is a ceiling, not a fixed price — you can pay less than you bid.
Daily budget. This is the one that surprises people, and Amazon documents it explicitly: “The daily budget is a daily amount you are willing to spend on a campaign over a calendar month. For example, if you set your daily budget at $100, you may receive up to $3,100 worth of clicks in that calendar month (assuming a full 31-day month)” (Amazon Ads, data checked 2026-08-22).
Read that carefully: the budget is a monthly average, not a hard daily stop. A campaign can spend above its daily number on a high-traffic day and below it on a quiet one. Authors who check a single day’s spend and see an overage often conclude something is broken when the mechanism is working as published. Budget on the month, not the day.
Common mistakes
Treating list price as spend headroom. A $4.99 eBook does not give you $4.99 per sale. Royalty rate and delivery costs come out first, and the remainder is the entire budget a sale can support.
Waiting for Sponsored Brands. Authors who read a guide written for a three-title catalog sometimes stall, assuming the headline format is the real one. Sponsored Products carries most author campaigns regardless of catalog size.
Publishing the third book and stopping. The three-title condition is completed in Author Central, not in KDP. Publishing alone does not open the format.
Judging a book campaign on the first week. Book discovery moves slower than commodity retail, and read-through across a series is invisible in single-title campaign reporting, which understates a series author’s actual return.
Advertising a book that is not ready. Ads amplify a detail page; they do not repair one. A cover, description, and category placement that convert poorly will convert poorly with paid traffic too, at cost.
Assuming seller advice applies unchanged. Guidance built on Seller Central screens and physical-product margins can be actively wrong for an author account.
A first-campaign checklist
- Confirm the book is live in one of the marketplaces where Sponsored Products is offered for books, not in draft or under review.
- Work out your royalty per sale before setting any bid — that number, not the list price, is your ceiling.
- Set up Author Central and claim your titles under a pen name, whether or not you have three yet.
- Check your claimed title count: fewer than three means Sponsored Products only.
- Enter through KDP’s promote and advertise link or Author Central’s Reports and marketing tab, and expect to land in the Amazon Ads console.
- Start with automatic targeting to surface search terms you would not have guessed.
- Set a daily budget you can afford for a full month, remembering it is averaged across the calendar month.
- Harvest the search-term report once real click volume exists, promote winners into a manual campaign, and add losers as negatives.
- Judge results against royalty, not against impressions or clicks.
Frequently Asked Questions
Do I need a Seller Central account to advertise a KDP book?
No. KDP authors advertise through the Amazon Ads console, reached from KDP or from Author Central. Seller Central is the interface for physical-product sellers and is not part of the author workflow.
Why can I not select Sponsored Brands?
Almost always the three-title condition. Per KDP Help on 2026-08-22, you must add at least one pen name with three unique titles to your Author Central account. It is a catalog-and-claiming condition, not a spend tier, so raising your budget will not unlock it. One caveat: a 6 June 2025 Amazon Ads announcement says the format is open to single-title authors while the guides still state the three-title rule, so check the console before assuming you are locked out (data checked 2026-08-22).
How much does it cost to start advertising a book?
There is no subscription, no upfront charge, and no minimum commitment; you are billed on clicks (Amazon Ads, data checked 2026-08-22). The practical minimum is a daily budget you can sustain long enough to collect meaningful click data.
Is the daily budget a hard daily limit?
No. Amazon documents it as an amount spent over a calendar month, with a $100 daily budget corresponding to up to $3,100 of clicks in a 31-day month (data checked 2026-08-22). Individual days can run over or under.
Can I run Kindle lockscreen ads as a self-published author?
Kindle E-reader lockscreen placement is bought through Amazon DSP via self-service open auction, listed for the United States as of Amazon’s 24 April 2026 announcement (data checked 2026-08-22). It is not part of the KDP Sponsored Ads flow, and no official page detailing author-facing requirements for it could be retrieved on that date.
Conclusion
The structure is simpler than the number of interfaces suggests: three consoles, one place where campaigns actually exist, and a gate defined by claimed titles rather than by budget. An author with one book has one real starting point — Sponsored Products, cost-per-click, budget averaged across the month — and the work that matters after that is royalty math and search terms, not hunting for a hidden setting. The three-title rule on Sponsored Brands is a milestone to publish and claim toward, and Author Central is where you claim it.