Google unveiled Google Play Textbooks, a dedicated category on the Play Store for learning material.

Henceforth Google joined Apple in the textbooks market, with Google Play Textbooks. Intended for students, it will offer titles from the top five publishers. As of August 2013, via Android, iOS
and the web, Google will enable students to rent books for six months in addition to buying them outright.

Pending the date, interactivity like on Apple iBooks 2 textbooks on iPad(HD videos, interactive charts, pictures galleries, HTML widgets and such) is awaited.