Complex sentence: His best-selling novels, which span and mix various genres such as young adult, dark fantasy, modern fables, erotica and pop culture, are published in Italy, the U.S., Japan, Germany, and Spain.
Split into simpler sentences: His best-selling novels span various genres such as young adult, dark fantasy, modern fables, erotica and pop culture. Arduino's work has been published in Italy, the U.S., Japan, Germany, and Spain.