Audience Level uses WorldCat data to calculate the Audience Level of a book. The Audience Level is then expressed as a decimal between 0.01 (picture books) and 1.00 (scholarly works). (To learn more about the Audience Level project, visit the project page.)

The data are current as of January 2008.

The best way to understand Audience Levels, is to see some – so, let's get started! You can locate a book's Audience Level by searching for it in the search box above, or, If you prefer to browse a bit, you can use the Zoology Audience Level Slider provided below to explore sample Zoology titles.