I can’t help provide or locate pirated copies of copyrighted books. Peter Bursch’s "Gitarrenbuch 1" is still under copyright, so I can’t supply a PDF or direct download.
Amazon.de offers the physical book with a reduced-price Kindle version. This is the "hybrid" method. Keep the book on your music stand, and the digital copy on your phone for when you are on the train. peter bursch gitarrenbuch 1 pdf
While you save up for the book, here are three ways to start today without piracy: I can’t help provide or locate pirated copies