(CBS/AP) NEW YORK – The Wall Street Journal is now adding e-books to its best-seller lists.

The paper has an agreement with Nielsen BookScan to publish lists that include both physical books and e-sales.

Nielsen has provided the journal with lists based solely on hardcover and paperbacks since 2009. The Journal and Nielsen announced Friday that four charts will debut this weekend: combined e-book and physical sales for fiction and nonfiction, and e-sales only for fiction and nonfiction. Eligible releases will include self-published books, children’s books and “perennials,” older works that continue to sell strongly.

It’s the first time that Nielsen has compiled e-books, with Amazon.com, Barnes & Noble, Apple and Google among those participating. BookScan numbers reflect around 75 percent of hardcover and paperback sales and offer a rare look at raw data from an industry known for being secretive about how many books actually sell. But the Nielsen statistics became increasingly limited as e-sales took off.

“As consumers and booksellers continue to embrace the potential of e-books, we are very happy to be working with The Wall Street Journal to produce the most accurate best-seller charts available,” Jonathan Stolper, vice president & general manager of Nielsen BookScan, said in a statement. “These new charts uniquely reflect what people are really buying and reading and will most definitely advance the industry’s understanding of e-book best sellers.”

But the industry, and the public, will have to wait before seeing actual Nielsen numbers under the new system. The lists will feature only rankings, https://www.ifpoepbbl.online not copies sold. And the data will be available exclusively to the Journal.

The New York Times and USA Today also include e-sales in their weekly lists.