IVP - Andy Unedited - What Does That Amazon Sales Rank Mean, Anyway?

September 8, 2008

What Does That Amazon Sales Rank Mean, Anyway?

One of the most convenient “real time” views of how a book is doing is to check out Amazon’s sales rank. It’s simple (the lower the number, the better the sales), it’s convenient (just a click away), and it’s empirical (gotta love those numbers). Alas, as Aaron Hierholzer says, “the Amazon sales rank is a fickle mistress.”

Hierholzer sees the ranking as “more like a popularity contest than the litmus test for a book’s success.” Not only does Amazon’s secret formula include complex algorithms, there are varying rates of decay built in, predictive curves, different refresher rates and a part played by historical sales. (You know, figures don’t lie but liars figure.) More than hard facts, the ranking, in Amazon.com’s own words, is meant to be merely “interesting.”

Some folks have tried to extrapolate what the rank actually means in terms of sales. Morris Rosenthal provides a chart that estimates a rank of 100 meaning 100 books sold per week on Amazon, while a rank of 100,000 means about 10 are sold a week. Brent Sampson estimates about the same for a rank of 100 but more like 1 a week for a rank of 100,000. Still other observers (such as Rampant TechPress) offer their own calculated guess.

Since it is essentially impossible to know what the ranking means or why it goes up or down when or as much as it does, authors and publishers are most likely better off putting energy into other things than trying to directly influence the rank. Personal appearances by the author, print and electronic publicity, word of mouth recommendations, effective direct marketing--all the normal things we do day in and day out are what will make a difference.

Amazon sales rank? Doesn't mean much, but it sure is fun.

Posted by Andy Le Peau at September 8, 2008 9:36 AM Bookmark and Share

Comments are closed for this entry.

Get Email Updates

You'll get an email whenever a new entry is posted to Andy Unedited

Blog Favs

Subscribe to Feeds

Got a Book Idea?

Please follow our submissions guidelines. We cannot respond to book proposals or inquiries within the context of this blog.

Get to Know IVP

book cover"Some publishers tell you what to believe. Other publishers tell you what you already believe. But InterVarsity Press helps you believe," says J. I. Packer. Andy Le Peau and Linda Doll describe how this came to be a hallmark of InterVarsity Press in Heart. Soul. Mind. Strength, an anecdotal history spanning the sixty years from the founding of IVP in 1947 to the present day.