The book Generative Gestaltung by Julia Laub, Hartmut Bohnacker, Benedikt Gross and Claudius Lazzeroni is out. I wrote a small article about Gestalt for it. Haven’t received my copy yet but it looks really nice judging from the preview PDF that I have. Check out the website where you’ll find more info. It’s available at Amazon. So far it’s only available in German but an English edition will come out soon.