Last reviewed by Robert Prime — May 2026
Introduction
When indie authors hear "BookBub", they usually mean the Featured Deal — the curated editorial email feature. But BookBub also runs a separate cost-per-click ad platform: BookBub Ads.
BookBub Ads is less famous than Featured Deals but more accessible (no editorial gatekeeping — you apply, you advertise). For UK indies expanding internationally or wanting to target specific reader audiences, it's a useful complement to Amazon Ads.
This guide covers what BookBub Ads is, when it works, what it costs, and how it compares to Amazon Ads.
What BookBub Ads actually is
BookBub Ads runs cost-per-click image ads to BookBub's email subscribers and website visitors. You bid on click costs; you pay when readers click your ad.
Key differences from Featured Deal:
- No editorial approval — apply and run
- CPC model — pay per click, not per slot
- Multi-country reach — UK, US, Canada, Australia, India, plus international English-speaking subscribers
- Highly-targetable — by specific author readership
- Lower per-day cost — £5-£500/day vs £200-£900 single-day Featured Deal
You can run BookBub Ads anytime — no application, no quarterly limits.
What it costs
CPCs vary by genre and targeting:
| Genre | Typical CPC |
|---|---|
| Romance | £0.30-£0.80 |
| Thriller / Mystery | £0.40-£1.00 |
| Sci-fi / Fantasy | £0.50-£1.50 |
| Literary fiction | £0.70-£2.00 |
| Non-fiction | £0.60-£1.50 |
For comparison: Amazon Ads CPC is typically £0.20-£0.80 for the same genres. BookBub is somewhat more expensive per click but reaches a different audience.
Minimum budget: about £100/month for meaningful data. Below that, you can't iterate.
Targeting — the unique strength
BookBub Ads' standout feature: target by author.
You can run ads to "people who have followed [Author Name] on BookBub". For an indie writing in the cosy-mystery space, that means targeting Agatha Christie readers, Alexander McCall Smith readers, etc.
Available targeting:
- Author followers (most-used targeting)
- Category interests (romance, thriller, etc.)
- Country (UK, US, Canada, Australia, India, multi-country)
- Retailer (people who click Amazon links vs Apple, Kobo, B&N)
This is more granular than Amazon Ads' keyword-only targeting. You don't need to guess keywords — you target the readers directly.
When BookBub Ads beat Amazon Ads
1. International audiences beyond Amazon US/UK.
- BookBub has strong UK, US, Canadian, Australian, Indian audiences
- Amazon Ads requires separate UK + US campaigns; BookBub one-stop
2. Author-readers targeting.
- Targeting Author X's readers directly often outperforms keyword targeting
- Amazon Ads' "Product targeting" partially does this but BookBub is more direct
3. Image creative matters.
- BookBub ads are visual (book cover prominent)
- Lets you compete with strong cover better than Amazon's text-heavy results
4. KDP Select authors who want non-Amazon discovery.
- BookBub readers click Amazon links from BookBub
- Drives Amazon sales without your spend going to Amazon's ad system
5. Wide-distribution authors.
- BookBub serves Amazon, Apple Books, Kobo, B&N, Audible links
- Better cross-retailer attribution than Amazon Ads
When Amazon Ads beat BookBub
1. Tight budgets (£50-£100/month).
- Amazon Ads more economical at low spend
- BookBub needs £100+/month for data
2. KDP-Select-only books.
- Amazon Ads attribute KU page reads
- BookBub doesn't
3. New books with no reviews.
- BookBub readers expect reviews + social proof
- Amazon Ads work even at 0 reviews (lower conversion but real)
4. Specific keyword-driven niches.
- Amazon Ads finds searchers in a niche category
- BookBub Ads is broader targeting
5. Books already established on Amazon.
- Amazon's algorithm rewards established books; BookBub Ads bring fresh discovery
Setting up your first campaign
- Sign up at partners.bookbub.com (free)
- Click "Ads" → "Create Ad"
- Upload your ad creative:
- Standard size: 300×250 image (cover + minimal text)
- Best practice: book cover prominent, no busy text overlays
- Add your URL (Amazon book page or universal book link)
- Set targeting:
- Authors (recommended: 5-15 comp authors)
- OR genre category
- Country
- Set bid: start at the recommended CPC
- Set daily budget (£5-£20 for first campaigns)
- Launch
Time to set up first campaign: 20-30 minutes.
Ad creative — what works
BookBub Ads are visual. Cover-driven.
Strong creative:
- Book cover prominent (80%+ of ad space)
- Tagline overlay (10-15 words max): "If you love [Author X], you'll love this."
- "FREE" or "$0.99" badge if running discount promo
- Series number if relevant ("Book 1 of the Yorkshire Mysteries")
Weak creative:
- Cluttered text overlay
- Multiple book covers (single-book ads outperform)
- Generic blurb on the ad image
- Author photo (irrelevant for fiction)
You can run multiple ad variants — BookBub auto-rotates and you keep the winner.
Click-through rate (CTR) and conversion
Typical performance:
| Metric | Range |
|---|---|
| CTR (clicks ÷ impressions) | 0.3% - 0.8% |
| Conversion on Amazon page (clicks → buys) | 5% - 15% |
| Cost per sale (CPC ÷ conversion) | £4-£15 |
For a £4.99 ebook earning 70% royalty (£3.49), a £4-£15 cost per sale is mostly unprofitable on its own.
But: launch-day BookBub ads spike Amazon algorithm, which drives organic sales, which compound. The direct ROI is rarely positive; the indirect ROI often is.
Strategy patterns
1. Launch week amplification.
- Run BookBub Ads with your launch
- Targets engaged readers for first 7 days
- £200-£600 spend over launch week
- Combined with Amazon Ads, BookBub adds discovery layer Amazon misses
2. Series funnel.
- Book 1 priced at £0.99 or free
- BookBub Ads to book 1 (cheap to acquire reader)
- Series funnel converts to books 2-5
- ROI calculated across whole series, not just book 1
3. Backlist revival.
- Older book that's plateaued
- BookBub Ads with refreshed cover
- Re-introduces book to new readers
4. International expansion.
- Targeting UK readers if you're US-based, or vice versa
- BookBub's multi-country reach makes this easier than Amazon Ads' per-marketplace setup
5. Direct sales support.
- Drive readers to your own website (via universal book link tools like Books2Read)
- Capture email signups + sell directly
- Sometimes higher per-sale royalty than Amazon
Common mistakes
- Generic targeting. "Romance readers" reaches everyone. Target 5-15 specific comp authors instead.
- Underbidding. Below recommended CPC = ads don't show. Bid competitively.
- Daily budget too low. £2/day starves the algorithm of data. £10-£20 minimum.
- No ad variants. Run 3-5 creative variants; keep winners.
- Not connecting BookBub data to Amazon outcomes. Watch sales on Amazon, not just BookBub clicks.
- Treating BookBub as a Featured Deal substitute. Different products; Featured Deal is still higher-impact for the right campaign.
- Running ads at full price with no special pricing. Discount + BookBub Ads outperforms full-price + ads.
UK considerations
- BookBub UK list is smaller than US but quality. UK-targeted ads convert reasonably well.
- UK indie authors can use BookBub Ads to target US readers easily — much simpler than running separate amazon.com Amazon Ads.
- Multi-country English-language ads serve UK + US + Canada + Australia + India together with one campaign.
- GBP billing — invoiced in GBP, easy for UK businesses.
- VAT — VAT-registered authors can claim back VAT on ad spend; below threshold, treat as deductible.
When NOT to use BookBub Ads
- Books with <20 reviews. Conversion suffers — readers click but don't buy.
- Books with weak covers. BookBub is visual; cover-driven ads need strong covers.
- Tight budget (<£100/month). Not enough data to optimise.
- Newer authors with no comp authors known. Difficult to identify good targeting.
- Books in dying genres. No reader demand = wasted clicks.
The bottom line
BookBub Ads is a useful complement to Amazon Ads — not a replacement. It excels at author-readers targeting and multi-country reach. CPCs are 50-100% higher than Amazon's but reach a different audience.
For most indies: start with Amazon Ads (cheaper, easier). Add BookBub Ads when you want international amplification, series funneling, or audience-specific targeting Amazon can't match.
Budget £100-£300/month for meaningful data. Run 3-5 ad variants. Track sales on Amazon, not just BookBub clicks.
Frequently asked questions
Are BookBub Ads better than Amazon Ads?
Different audiences, different mechanics. Most successful indies run both.
Can I run BookBub Ads without a Featured Deal?
Yes — fully independent product. Apply for both separately.
How long should I run an ad before deciding?
14-30 days for meaningful data. Iterate after that.
What if my CTR is below 0.3%?
Creative problem. Test new cover-led images, sharper tagline copy.
Should I target broad categories or specific authors?
Specific authors. 5-15 comp authors outperforms broad-category targeting almost always.
