According to the Association of American Publishers (AAP) StatShot report for the first half of 2012, sales revenue in the children’s and young adult category skyrocketed by nearly 41 percent compared to the same period last year–rising to $845 million.

Those gains were driven by a 251.5 percent increase in children’s and young adult digital books (see the chart embedded above). At the same time, adult fiction and nonfiction sales increased 8.3 percent.

Below, we’ve embedded a chart below that breaks down overall year-to-date sales by category as well. The AAP collected information from 1,186 different publishers to compile the report.