Simplify the following text for a Grade 4 native English-speaking person.
Original: His best known and most substantial work is The Adventures of Tintin comic book series , which he wrote and illustrated from 1929 until his death in 1983 , leaving the twenty-fourth Tintin adventure Tintin and Alph-Art unfinished .
Simplified: He is most famous for his comic , The Adventures of Tintin .