Negative Keywords in Amazon Ads for Books: Full Guide

Negative keywords are search terms you tell Amazon Ads to not show your book for. They stop your ad budget from bleeding out on clicks from people who will never buy your book. If you're running Sponsored Products or Sponsored Brands campaigns for your KDP titles and you're not using negative keywords, you're almost certainly wasting money.

What Negative Keywords Actually Do in Amazon Book Ads

Every time someone searches on Amazon, the ads system matches their search query against your targeted keywords. Without negative keywords, Amazon will happily show your cozy mystery to someone searching for "mystery coloring book for adults." They click. You pay. They bounce. You lose $0.30 to $0.75 for nothing.

Negative keywords act as a filter. You add "coloring book" as a negative keyword, and Amazon skips your ad for any search containing that phrase. Your budget goes toward people actually looking for a cozy mystery novel instead.

Two match types exist for negatives in Amazon Ads:

• Negative phrase match: Blocks your ad when the search query contains that exact phrase in order. "Coloring book" blocks "mystery coloring book" and "coloring book for kids" but not "book for coloring."
• Negative exact match: Blocks your ad only when the search query matches the term exactly. "Coloring book" only blocks the search "coloring book" and nothing else.

In my experience, negative phrase match is what you'll use 90% of the time for book ads. It catches more irrelevant variations without you needing to list every possible combination.

Where to Find the Search Terms That Are Draining Your Budget

Amazon gives you a Search Term Report inside the advertising console. Go to Reports > Sponsored Ads Reports > Search Term. Download it. Open it in a spreadsheet. Sort by spend, highest first.

You're looking for three things:

• High spend, zero sales: If a search term has eaten $10 or more without a single order, it's a strong negative keyword candidate.
• Irrelevant intent: Terms where the reader clearly wants something different. You wrote a fantasy romance novel, and "fantasy football draft guide" is triggering your ad. Kill it.
• Wrong format: Searches for "audiobook," "pdf," "free download," or "kindle unlimited" when your book isn't in those formats or programs.

Check this report weekly if you're spending more than $5/day. Every two weeks is fine for smaller budgets. The data accumulates, and patterns become obvious fast.

Common Negative Keywords Every Book Author Should Consider

Your negative keyword list will be specific to your genre and book. But some terms show up as money-wasters across almost every KDP author's campaigns:

• Format mismatches: "coloring book," "workbook," "textbook," "audiobook," "hardcover" (if you only sell paperback/ebook)
• Free seekers: "free," "free download," "pdf," "read online free"
• Academic/educational: "study guide," "sparknotes," "cliff notes," "summary," "analysis" (unless you sell study guides)
• Age mismatches: "for kids," "for toddlers," "for children" (if you write adult fiction), or vice versa
• Competitor brands you can't beat: Some author names or series names will drain your budget with zero conversions. If Brandon Sanderson fans aren't converting on your debut fantasy novel after 50+ clicks, add his name as a negative.

Don't go overboard on day one. Start with the obvious irrelevant terms and build your list from real data. Being too aggressive with negatives can strangle your reach before your campaign has a chance to find its audience.

How to Add Negative Keywords to Your Amazon Ad Campaigns

The process takes about 30 seconds per campaign:

1. Open Campaign Manager in your Amazon Ads dashboard.
2. Click into the campaign you want to edit.
3. Click into the ad group.
4. Select the "Negative Targeting" tab.
5. Click "Add negative keywords."
6. Enter your terms, choose phrase or exact match, and save.

You can also add negative keywords at the campaign level (affects all ad groups in that campaign) or at the ad group level (affects only that specific group). Campaign-level negatives are useful for broad terms like "free" or "coloring book." Ad group-level negatives help when you're running multiple ad groups targeting different sub-genres or audiences within one campaign.

For bulk uploads, download the campaign spreadsheet template from the advertising console, add your negatives there, and re-upload. This saves a lot of clicking if you're managing 10+ campaigns.

Building a Smarter Keyword Strategy from the Start

Negative keywords are reactive by nature. You see wasted spend, then you block it. But you can get ahead of the problem by doing better keyword research before you launch campaigns.

If you start with tightly relevant keywords that match your book's actual content and audience, you'll generate fewer irrelevant search terms in the first place. The PublishRank Keyword Research Tool is useful here because it pulls keyword data specific to the book market, helping you find terms real book buyers use instead of generic phrases that attract the wrong clicks.

Pair good upfront research with an ongoing negative keyword routine, and your ACoS (advertising cost of sale) will trend down over time. That's the real goal: spending less per sale, not just spending less overall.

A Simple Weekly Negative Keyword Routine

Here's what a solid maintenance habit looks like:

1. Download your Search Term Report every Monday (or whatever day works).
2. Sort by spend, descending. Look at the top 50 search terms.
3. Flag anything with spend over $5 and zero orders. Check if the term is genuinely irrelevant or just underperforming.
4. Add clearly irrelevant terms as negative phrase match keywords.
5. For borderline terms (relevant but not converting yet), give them another week or two of data before deciding.

Honestly, this takes 15 to 20 minutes per week. Authors who do this consistently see their click-through rates improve and their cost per sale drop by 20% to 40% over a few months. The ones who set up campaigns and never look at their search terms? They're the ones posting in forums about how "Amazon Ads don't work for books."

Amazon Ads absolutely work for books. But only if you're intentional about where your money goes. Negative keywords are one of the simplest, most effective tools you have to make that happen.