Malcolm Owen, AppleInsider:

Apple is taking legal action against former german App Store manager Tom Sadowski and publisher Murmann Verlag to stop circulation of a book about his work, under allegations it reveals confidential “business secrets” that the author wasn’t allowed to disclose.

And:

Released on Tuesday in Germany, the book “App Store Confidential” by Sadowski is said to be a behind-the-scenes view of how the App Store works from the former manager’s viewpoint. The book details Sadowski’s journey into Apple, his personal experiences in working inside the App Store, and his meetings with Apple CEO Tim Cook.

Is it possible the author did their work for Apple without signing an NDA? If there was an NDA, was the publisher aware of it? Can’t speak to German publishing contracts but, in the US, every publishing agreement I’ve ever signed included a clause that made me responsible for ensuring that I had the right to publicize the contents of the published work.

I’ve got a feeling this is not going to end well for the author or the publisher.

But the book has shipped, the toothpaste is out of the tube, no putting it back. Best Apple can do is limit the spread.