I am a native German speaker and was thrilled to find the book on the American Amazon. I am very disappointed after receiving it and finding lots of misprints and spelling errors. The editor of this book did not do their job.
I saw a review by a high school teacher who uses it in her/his classes. I sure hope he/she corrects all the misspellings before they hand out the book.
For example: Dien instead of Dein, and instead of und, grafte instead of fragte,