Simplify the following text for a Grade 6 native English-speaking person.
Original: Wertham always denied that he favored censorship or had anything against comic books in principle , and in the 1970s he focused his interest on the benign aspects of the comic fandom subculture ; in his last book , The World of Fanzines ( 1974 ) , he concluded that fanzines were `` a constructive and healthy exercise of creative drives '' .
Simplified: In his last book , The World of Fanzines ( 1974 ) , he concluded that fanzines were a good way to be creative .