Summer Reruns: Fun With Numbers: An Author’s Guide to Free Sales Data

In case you missed it the first time, I'm re-running this useful (and gently updated) post about tracking your book's sales data online.

By Sarah P.

So what’s a girl to do if she wants to know how her book is selling?  The answer used to be: stare at your Amazon ranking, that curious but meaningless statistic.  But these days, you can do better.  The following is a brief tour of the free data available to you if you know where to look. 

First Stop:
When you register your book at, the site will begin taking hourly looks at your Amazon sales rank.  So closely does NovelRank track the hourly updates from Amazon’s API (which is nerdspeak for data stream) that the site can tell when you make a sale.  So NovelRank (which, in spite of its name, will happily keep an eye on nonfiction books too) can show you a charted history of your Amazon ranking and tell you with reasonable accuracy how many books were ordered via or its international subsidiaries.

Caveat: if your book is selling so well that multiple sales occur during each one-hour observation period, Novelrank’s sales figures will be understated.  But if you’re selling multiple copies per hour, you won’t really care.

Other Caveat: you have to keep going back to Novelrank every couple of weeks to look at the results.  If you forget to check back, they’ll stop following your book.  If you can remember to visit your data once in awhile to keep it active, Novelrank will store a full year’s worth of data, and you can export the numbers to a spreadsheet whenever you wish.

Second Stop: The Evil Empire’s Author Central Program
Amazon, for all their carnivorous ways, has given authors a luxury-priced gift: Bookscan data.  BookScan is the bookstore arm of Nielsen (the TV people who keep track of whether or not you watch American Idol.)  Their data captures point-of-sale numbers at many of the nation’s bookstores, but not at some big box stores like Wal-Mart.  If you register for Author Central on Amazon, and then link your books to your profile, the “Sales Info” tab will show you BookScan data for your own books.

Not only do you see how many sales of your book BookScan reported for a given week or period of weeks, you’ll see a geographical breakdown of where those books were sold.  The 100 regions have been divided up as oddly as gerrymandered congressional districts, but the data is solid.  My Ski House Cookbook is a perfect test case.  Guess where its most active regions lie?  The Denver area is always at the top of the charts for me, followed by the BookScan blob representing Vermont and New Hampshire.  But there are surprises too.  Southern California appreciates ski house cookery at a rate unforeseen by moi.

Caveat: Amazon does not archive this information—you only get 8 weeks of free Bookscan data at a time.  If you want to save the data, open up a spreadsheet and enter in your weekly numbers.  If you remember to look at least every 8 weeks, you can save it all.

Sanity check: this data is updated only once per week. I forbid you to stare at it more often than that.

Third Stop: Your Own Publisher. Hopefully.
Publishers have finally begun to understand that they are better off if Amazon isn't the best resource in town even for traditionally published authors. So the past year has seen a few of them, including Random House, unroll new sites and features for their authors. The RH site is the only one I've experienced personally, but it is a triumph. My fingers are crossed that other publishers will follow suit.

So, now that you have sales data for your book, what should you do with it?
Authors have often said that staring at numbers can only make a person crazy.  And surely that's a risk.  But there are things you can learn from the numbers, especially from the geographical data.  Is your book about to be released for the first time in paperback?  If you know which regions had the best sales in hardcover, it’s easier to make a push for touring there. 

Also, you will learn something about the effectiveness of your own marketing efforts. If you've been driving all over the tri-state area to do bookstore events and book club meetings, you will probably see a corresponding sales concentration in that area. Don't forget that the effectiveness of your bookstore events is greater than the number of attendees at your events.  Bookstores who take the time to invite you in will often A) advertise the event, and therefore the book and B) hand sell the leftovers afterwards. 

Finally, don’t forget that this is data that publishers can see.  They pay many thousands of dollars each year to Nielsen for the privilege of slicing and dicing any book’s sales data whenever they see fit.  When the time comes to negotiate your next book deal, it’s good to know what numbers they're looking at.

And there you have it. Use it well, but not too often.  That way lies the abyss.


  1. This is terrifically helpful. Thank you, Sarah. As you say, this is proper information - much more useful than staring at a meaningless (and frequently dispiriting) amazon sales ranking, which is what I used to do! And your advice at the end is exactly right - beware the abyss!

  2. Thanks so much for this, Sarah! I had no idea that Amazon provided BookScan data to Author Central members -- as an author with a book on the way (out next week!) that's great to know.

    I noticed that there are a lot of Amazon ranking trackers. Is there a reason you picked over the others? Anyone have good (or bad) experiences with other services?

  3. YarmYarm--love your cover art. Very cool.

    There are several sites that will track your Amazon rank, but NovelRank is the only one that I know which can convert that rank into sales figures. It's that algorithm that makes them special, in my opinion.

  4. I really appreciate this info. Empowers me a little bit more. And thanks for the explanation about NovelRank. My book comes out in February, and I'm trying to set up my tasks.

    Hope Clark

  5. How did you acquire this Jedi knowledge? I have little idea what any of it means (and don't really have to right now because I have no book on the market to track, but a girl can dream). So much to learn.

  6. Shannon--I am a recovering business nerd. I adore data, the way that some people adore chocolate. Also, I don't mind doing my income taxes.

  7. Power to the people (or at least the writers!!) If you have a new book published (commercial: LIE my debut novel is out this week) -- does it take 8 weeks until you can see the data? I want to see it now....

  8. Hi Caroline, and congrats on your launch! No, you do not have to wait 8 weeks. Today's Bookscan update (the data is updated on Fridays) covers August 22 through August 28. So that's a one week lag. You can see numbers for 8 weeks at a time, which means that the oldest data stored for me right now is from early July through the end of August.

    1. Sarah -- hi -- I just re-read this article and have another question now that I am several months into this business -- is there any way to track e-book sales? I was surprised to learn that there is not an independent tracking service. Am I the only one who finds this curious?? Your earlier advice was invaluable to my sanity. Truly, author of LIE.

    2. The answer is yes and no. There is currently no way for an author to see her ebook sales via Bookscan. (Although Bookscan is just starting to track ebook sales, as of late last year. See the WSJ article on their new e-bestseller lists, but be prepared to be confused.) This is a developing story, so I wouldn't be surprised to eventually see e-book numbers pop into all the bookscan venues (Amazon, publishers' in-house portals) eventually.

      NovelRank does track kindle sales (but not nook sales or apple sales), although you must enter the kindle version of your book as a separate title.

  9. I freakin love this blog. On my to-do list next week: Post a LinkedIn link to this, for all my writer friends.

  10. I am with Shannon. This aspect of the business intimidates and confuses me.

    Luckily for me, I have a friend who patiently explains it all. ;>

  11. I need to bookmark just about everything you post.