Due to a lawsuit between SonyBMG and Kosmos, the publisher of the german "Die drei ???"-books the audio-series "Die drei ???" were not published between 2006 and 2008. To respond to this, the label EUROPA (then sitting in Hamburg), as part of SonyBMG, started a series called "Die Dr3i - Neues aus Rocky Beach" in 2006. This series was, as "Die drei ???" is based on Robert Arthur's "The three Investigators".