Simplify the following text for a Grade 6 native English-speaking person.
Original: Hugo published his first novel the following year ( Han d'Islande , 1823 ) , and his second three years later ( Bug-Jargal , 1826 ) .
Simplified: Hugo published his first novel in 1823 ( Han d'Islande ) . His second came three years later ( Bug-Jargal , 1826 ) .