I read this book in English, but you can also buy it in German.
It's not a detailed guide with writing tips or anything like that. It's a great motivational boost and a good summary of the mindset of creatives and artists.
Austin Kleon addresses timeless and brazil telegram screening cross-industry principles – the book is therefore useful not only for writers , but also for musicians, painters and photographers.
This book is especially good if you doubt yourself or need a little inspiration. With entertaining sketches and drawings, the book is very easy and quick to read.
Best quote:
"If someone calls something 'original', they simply don't know the artist's source."
Creativity : 7 scientific methods to increase it
Creative Writing : The 25 Best Exercises
Becoming a Writer : The 13 Secrets of Successful Authors.