The By ISBN display will show the actual editions of each title that are selling or circulating the best. For example, if the paperback version of a recent title is selling the best in the retail market, that paperback version will populate this list. You may stock the hardcover, but if you don’t stock the bestselling paperback, the graph will indicate that you do not carry that title.
The By ISBN view is a pretty black and white way to look at things, which some people very much appreciate.
There’s a very good chance, however, that you may not care, strictly speaking, which version you have, as long as you do have some version of the most popular titles. The By Family display view will actually measure the most popular titles according to all versions/editions. You can then, for example, click in to the red pie wedge, the Not in Stock, and see titles that are moving well enough to be considered “Most Popular” but that you do not own in any version. The Title Detail screen will look a bit different, here, from the By ISBN view’s title detail list in that you will have the option to view all versions of the title in question, see how each moves in the market place, as well as your own stock, if any.
Note that by “Family,” we are referring to a group of products, each with their own ISBNs, that are judged to be equivalent representations of the same work.
When viewing a title’s detail screen, you can see this family data by clicking the dropdown arrow next to the title:
Click on a different format to view the title detail screen for that format.