Complex sentence: Having grown up with his aunt's tales of Amelia's misadventures, Herman decided to carry on the legacy after his aunt's death in 1988, not wishing to entrust the future of the series into the hands of a children's author outside of the family.
Split into simpler sentences: Having grown up with his aunt's tales of Amelia's misadventures, Herman decided to carry on the legacy after his aunt's death in 1988. He did not wish to entrust the future of the series into the hands of a children's author outside of the family.