 Bohn's work was concentrated on multiple audio book series in which he left his own mark with his music.The record labels responsible for the audio story books, without Bohn's knowledge or permission, used his work to accompany the story telling in at least 16 audio book series totalling approximately 170 individual episodes.Bohn engaged Europa Records in a legal battle for copyright infringement that continues today, with the result that neither the record label nor Bohn were allowed to publish the original music used for the audio books.