My books:
Level Up!
► Level Up! https://leanpub.com/levelupnow (German)
►Level Up! https://leanpub.com/levelupnow_one_en (English)
Rock’n’Roll Survival Guide
RnR survival Guide on Amazon
My T-Shirts
► https://www.ebay.de/usr/rolfjoern
My CDs
https://www.ebay.de/itm/CD-Too-Much-Pressure-von-Excess-Pressure/324396779975