Net royalties per book
Royalties minus ad spend. The one number the whole business comes down to — and it is worked out book by book, not across the account as a whole.
AuthorLens — every KDP number in one place
Know exactly which books are making you money.
One analytics platform for Amazon KDP: ad and organic orders, campaigns, keywords, search terms, competitors, ratings, reviews and clear optimisation advice.
Your whole publishing business, on one screen.
Set-up takes a few minutes · Amazon Advertising data comes in directly · royalties through the browser extension · cancel anytime
authorlens.remskill.com/dashboard
1–31 Aug 2026
Dashboard
What the whole catalogue kept, after every ad dollar
Net profit
$4,400.25
$141.94 / day
Gross royalties
$10,667.51
$344.11 / day
Ad spend
$6,267.26
$202.17 / day
Units sold
1,213
39.1 / day
Organic orders
571
47.1% of sales
TACOS
58.8%
spend ÷ all royalties
See what is working. Find what is wasting money. Know what to do next.
An example month from a made-up author’s catalogue — the real screens are below.
23Amazon marketplaces in one place
0spreadsheets, exports or CSV files
1number that actually matters
0changes we make to your Amazon account
Inside AuthorLens
See it doing the work.
Every marketplace netted into one profit number. Every campaign measured against the break-even you actually earn. Every keyword shown with what it wasted. These are the real screens, on a real account.
authorlens.remskill.com/dashboardAnalyticsDashboard
Drag the screenshot sideways to see all of it →
01/11
Net profit for the whole catalogue, split by marketplace and shown in each storefront’s own currency. United States alone: $137,677.92 in royalties, $24,316.77 of ad spend, $113,361.15 kept — with the UK, Canada and Germany each counted in their own currency beside it.
A real AuthorLens account, captured 10 September 2026 — August 2026 end to end. Every figure is genuine; the titles, authors, covers, keywords and search terms are replaced with placeholders so the publisher's catalogue stays private.
What it replaces
Publisher Rocket and Helium 10 — in one dashboard.
Both do one part of the job well: they show you what readers are searching for. But the second question — how much this particular book kept after advertising — neither answers, before launch or a year later.
Publisher Rocket
one-time purchase · $199
- Keyword search with demand estimates for Amazon and Google, competition scores and expected earnings per term
- Competitor analysis by ASIN: keywords, sales estimates, BSR history, review counts, categories
- Category finder, including hidden ones, and how many sales a day it takes to reach number one
- Ready-made keyword lists for advertising campaigns
It does not count your sales at all — neither paid nor organic. Royalties, spend and what the book kept after launch stay outside it.
Helium 10
from $99/mo billed yearly · $129 monthly · built for Amazon sellers
- Cerebro: organic and paid keywords behind any competitor’s ASIN
- Magnet: keyword ideas from a seed term
- Xray: sales, price, BSR and review estimates right in the search results
- Black Box: niche discovery by filters
- Rank tracking and review analysis
It does not read KDP royalties or KENP reads — and without those there is no net profit per book, no organic sales, and no answer on which campaigns to fix.
AuthorLens
$39.99 a month · Amazon KDP only
Keywords, niches and competitors — everything they give you. Plus what neither of them has:
- Royalties, KENP reads and net profit per book
- Organic sales separated from paid ones
- ROI and ROAS per book, not per account
- Video and brand ad spend kept separate, never guessed onto a book
- Negative keywords and campaign fixes from your own data
- Sales by format: paperback, hardcover, Kindle
- An AI assistant that answers from your own numbers
It does not work with physical products: this is a tool for books on Amazon KDP only.
Comparison based on publicly available information as of August 2026. Publisher Rocket and Helium 10 are trademarks of their respective owners; AuthorLens is not affiliated with either.
Inside
What the dashboard shows you
Organic sales, separate from paid
See how many sales advertising brought and how many arrived on their own. You did not pay for the second kind — and they are exactly why ACOS always looks worse than the business actually is.
ROI and ROAS per book
Not per account and not per campaign, but for one specific title: which to put more into and which to stop.
Keywords
Which ones bring orders and which only spend the budget. Clicks, spend, orders and conversion for every term separately, not averaged across the campaign.
Campaigns
Everything the ad console holds, in one table: impressions, clicks, CTR, CPC, bids, orders, spend, conversion and ACOS — by campaign, ad group and target. You can see what is dragging you down and what deserves more budget.
The ad spend Amazon won’t tie to a book
A video or brand campaign can feature several books at once, so Amazon never says which one earned the sale. That spend gets its own line instead of being guessed onto a title — it still counts in your totals, and you can see exactly how much it is.
Charts and tables, set up your way
Any chart and any table can be configured: pick the metrics you care about, drop the columns you don’t, change the period and the breakdown. This applies across the whole product, not to one screen — and your choices are saved.
Paperback, hardcover and Kindle on one screen
How many copies each format sold and how much each one brought. No opening three reports to work out what is actually holding the book up.
Niches and categories
Amazon’s whole category tree: which niches are growing, what a book there costs and how many reviews it takes to compete. This is the research you used to buy a separate tool for.
Negative keywords in minutes
No opening every campaign one at a time. All search terms sit in a single list: the ones spending without a single order are obvious, and they can go straight into negatives.
Competitors
What is happening to the books sitting next to yours in the results — their price, rating, review count and how their rank moves.
An AI assistant that tells you what to do
Ask in plain words — which book was the most profitable in August, or where you are burning budget. It reads your own tables and answers from your own figures, never from a general opinion about publishing. Every number it quotes was computed before the model saw it.
Getting started
Three steps and not one spreadsheet.
01
Sign up
An email and a password — that is the whole form. We send one link to confirm the address.
02
Connect Amazon
The advertising console connects through Amazon’s official API; royalties come through the AuthorLens extension for Chrome or Firefox, because KDP has no earnings API of its own. Neither ever changes anything in your Amazon account, and together they take a few minutes.
03
The data comes in on its own
After that you simply open the dashboard. Nothing to reconcile by hand.
What not knowing costs
$6,267 on advertising in August. How much of it was wasted?
That is the spend in the example at the top of this page. If even a tenth of it goes to search terms that never convert, that is over $600 a month. The subscription costs $39.99.
- One campaign spends slightly too much — every day, for a month
- One search term collects clicks and never converts
- One profitable campaign gets paused too early
- One book quietly becomes dependent on paid traffic — and nobody notices
Seeing any of this takes numbers per book, not guesswork. One decision made in time pays for a year of the subscription.
Straight answers
We only ever read. Amazon’s own numbers.
Access
It never changes anything
AuthorLens only reads your reports. It never places a bid, changes a budget or touches a price. Amazon’s permission screen mentions campaign access because that is the only advertising permission Amazon offers — we use it to read, and for nothing else.
The data
Exactly what Amazon reports
Nothing is smoothed or invented. If a figure is missing, Amazon has not sent it yet — reports arrive with a delay, and the screen says so instead of drawing a zero.
The subscription
Cancel any time
From inside your account, in Settings. No calls, no retention offers, no minimum term.
Pricing
One plan. No tiers, no add-ons.
Monthly
$39.99
pay by the month, leave whenever
Yearly−18%
$32.99 / mo
$395.88 a year instead of $479.88
- Every book you publish, across all 23 Amazon marketplaces — no per-book fee
- Everything included from day one: no tiers or paid extras
- AI assistant and ad coach — connect your own OpenAI key and run as much as you like
- Up to 12 months of royalty and ad-spend history
- 100 research credits a month for competitor and market data — top up any time
- Telegram and email support — answered by us, not a bot
- Billed through Stripe · we only ever read your Amazon data
Before you start
What people ask most
Advertising data comes straight from Amazon Advertising over its official API once you connect the account. KDP has no API for earnings at all, so royalties arrive through the AuthorLens Sync browser extension, which reads the same reports you can already see in your own KDP account. Nothing is typed in by hand.
Your books are already producing the data.
Connect Amazon and look at the real numbers.