How does Book Report work?

Book Report is a bookmarklet. It is like a bookmark, but instead of bringing you to a different page when you click it, it runs some code. In this case, the code grabs your sales data from Amazon's servers and displays it for you.

Is my data safe?

Yes. Keeping your data secret is a top priority - we know how valuable it is. Sales data is always fully secured, using military-grade 256-bit AES encryption.

Where does Book Report's data come from?

Book Report currently gets data from two sources within KDP. It goes through the Sales Dashboard and checks the data for every book and every day. And the second source is the Prior Months' Royalties spreadsheets that KDP generates on the 15th of the month. The program knows which data source is more reliable in which situations, so the results you're shown are as accurate as possible.

How does Book Report estimate the value of page reads?

On the 15th of every month, the Prior Months’ Royalty report comes out and announces how much each page read was worth during the previous month. The tricky part is before that: You had 1000 page reads today -- how much money is that worth?

Different marketplaces also pay out different amounts per page. In March of 2017, page reads were worth $0.0046 USD but page reads were only worth $0.0034 USD. Since Book Report is now fully aware of the marketplaces, it can be smarter about that complexity.

There are now three settings for How should Book Report estimate KU earnings?

  • With the most recent rates. This option assumes that every marketplace will pay as much per page as it did last month.

  • Assume a drop is coming. This option assumes that every marketplace will pay less than it did last month. How much less? It finds the biggest drop for each marketplace that occured in the last 12 months, and assumes a drop slightly bigger than that one.

  • With a custom rate. If you want to keep things simple, you can still set a single custom rate that applies to all marketplaces.

I have a sale on a book, but no royalties. What's up with that?

Two things could be going on:

  1. You've made a sale, and the royalties are lagging behind the sales count. Amazon doesn't post sales and add royalties at the same time, so there's nothing for us to do about this.
  2. You've had a sale and a return. So the sale added some royalties, the return subtracted some, and the total is zero. Returns are also why you can sometimes see negative royalties.

So how exactly do the subscription plans work?

Once your free trial is up, assuming you're earning more than $1000/month you'll be presented with a form asking for your credit card details. All payments are processed by Stripe so you do not need to worry about security.

How do I cancel my plan?

Shoot an email to and we'll cancel your plan. If we've charged you since receiving the email, we'll refund that charge. If you aren't enjoying our service, we don't want to take your money.

How do I change my currency?

You'll find the currency option, as well as a few others, in the "Settings" tab.

Do you take feature requests?

Absolutely! Just send us an email, as vague or as specific as you'd like, and we'll get back to you about it. We can't promise to implement every idea, but we'll do our best. And we will get back to you, whether we're going to implement it or not.

Again, our email address is

How long does it take for all the reports to generate?

This can depend on a few things. Your internet speed, how quickly KDP is responding, and your computer. It shouldn't take more than an hour to get all your reports ready, and your first report should be ready within seconds or minutes. This huge data crawl process only happens once, after that is just finds new sales instead of going back over old ones.

Something weird/broken is happening. What should I do?

Three steps to hopefully solve any of your problems, once you've got it running:

  1. Refresh the page, click the bookmarklet again.
  2. Wait for the spinner to go away. If something is weird, and the spinner is going in the top left, it might just be trying to solve the problem for you.
  3. Email us at and tell us what's going on.

All software has bugs, so we can't promise everything will work perfectly all the time. But if you follow those steps, things will probably work out in the end.

Why don't you accept PayPal?

We considered PayPal as an option, as many authors like it, but in the end we couldn't use it. Three reasons:

  1. Privacy. When you pay with PayPal, the vendor can see your name and your address. We know that a lot of authors aren't comfortable with divulging this information.
  2. Lock-in. If you start using PayPal, they don't let you leave. It'd be like if KDP Select was a permanent exclusivity deal.
  3. Track record. Again and again and again, people report PayPal freezing their funds and only releasing them after a public out-cry. That's not the kind of business Book Report wants to work with.

So we're sticking with Stripe. If you're nervous about paying with Stripe, please head over to their gallery page. Kickstarter, Twitter, Reddit - all their payments are powered by Stripe. They're PCI Service Provider Level 1, which means they adhere to the most stringent security measures possible.

Who are you?

My name is Liam. I used to be a professional web developer, then I ran a publishing business through KDP, and now I run Book Report as a full-time gig. I originally built this tool for myself, but the few authors I shared it with convinced me to turn it into a product.

What should I do if you didn't answer my question?

Email us:

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