Complex sentence: Berg received many requests to write his memoirs, but turned them down; he almost wrote them in 1960, but he quit after the co-writer assigned to him confused him with Moe Howard of the Three Stooges.
Split into simpler sentences: Berg received many requests to write his memoirs, but turned them down. He almost wrote them in 1960, but he quit after the co-writer assigned to work with him confused him with Moe Howard of the Three Stooges.