Bookseller Unr found an error in an online textbook listing the most popular textbooks for the Apple iBooks app.

A search on the bookseller’s website turned up the books listed as part of the “Best Online Schools” list on the company’s website, which is part of its “Teacher Resources” section.

The books listed were not in the iBooks App catalog, but in the “App Store” section of the app.

“As we are unable to find the correct listing of books, we will no longer list these books for sale,” the company said in a statement.

The list of titles listed on the textbook finder was updated on Sept. 25 to include “The Unauthorized History of the United States” and “The Politics of the New Deal.”

However, a search on Apple’s website for “The New Deal” revealed no results.

The Apple App Store does not have an equivalent search tool for the iBookstore, which allows customers to buy and read textbooks from a variety of publishers, including Pearson, iBooks, Houghton Mifflin Harcourt, and Kobo.

However, it is possible that the same search tool is used for the iPad App Store, as the iAppstore lists books in the Apple App Catalog.

“We can’t tell you when or how many of these books have been removed from the app,” the textbook seller, Unr, wrote in a message to Polygon.

“Please let us know if you have any additional information.”

Unr also said that it would investigate the matter further.