Gaming isn’t enough to contain the ambition of Rovio, maker of the highly contagious Angry Birds mobile game series.

Next week, Rovio plans to disclose its “vision of digital publishing” and unveil its first book app at the Frankfurt Bookfair in Germany on Oct. 11. Peter Vesterbacka, Mighty Eagle and the chief marketing officer at Rovio, will make a presentation about the app at the event.

The book app serves multiple purposes. It will extend the Angry Birds (presumably, that’s the franchise) property from one media to another, satisfying fans who can’t get enough of it. It also diversifies Rovio’s business into a new form of media beyond the games and toys that it already sells. Rovio isn’t dropping any more clues about the content of the book yet.