Facebook Ads vs Amazon Ads for Authors: Which Should You Run?
- Jill Cooper
- Jun 25
- 2 min read
Facebook ads and Amazon ads do two different jobs. Facebook ads find new readers who are not searching for you yet, using your creative and their interests. Amazon ads catch readers who are already shopping for books, by placing you next to similar titles and keywords. For most fiction authors, Facebook is the stronger demand-generation engine; Amazon ads are a useful complement once your book page already converts.
What Facebook ads do best
Reach readers who are not actively searching, by genre and interest.
Scale: huge audiences and room to grow a winning ad.
Creative-driven: a scroll-stopping image and conversational copy do the targeting work, especially since Andromeda reads your text and image.
Feed your email list: send clicks to a reader magnet and you keep the relationship, not just the sale.
What Amazon ads do best
Capture intent: the reader is already on Amazon, ready to buy.
Keyword and product targeting: appear next to comp titles and in relevant searches.
Lower learning curve for simple campaigns, and sales attribution is cleaner because it stays on-platform.
Facebook finds readers who are not looking yet. Amazon catches readers who already are. Different jobs, not rivals.
Cost and measurement
Facebook reporting is fast but attribution to Amazon sales lags two to three days and misses roughly half of actual page reads, so KU authors lean on pages read per click rather than on-platform ROAS. Amazon ads report sales directly but compete on keywords that can get expensive, and they cannot create demand the way Facebook can. Neither is “cheaper” in the abstract; profitability depends on your read-through and your funnel.
Which should you run first?
If your book page converts but nobody sees it: Facebook ads to generate demand and build your list.
If you get traffic but want to catch ready buyers too: add Amazon ads as a complement.
If your budget is small: pick one, learn it properly with the test-analyze-adjust-scale loop, then expand.
The real answer is rarely the platform. It is the funnel. Ads do not create success; they scale what is already working. Make your book genre-correct, capture emails from every click, and the same ad dollar works harder on either platform.


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