The "School Books" program is a subset of the "Concur Plus" educational program, which is designed and built for free with the following features:
◀️ Availability of all high school books
◀️ The availability of lessons and chapters of each book separately and clearly for easy and quick access
◀️ Opening all books offline and without internet
It should be noted that this collection has three separate programs of 10th, 11th, and 12th grade books, all of which are under the name of "school books" and are available separately on the Play Store. By downloading one of these, you can access the other two; With the link that is available in the program. And by installing this program on phones (mobile phones), there is no need to buy school books with their large volume on hard drives.