Complex sentence: He is a son of William Targ, former editor-in-chief of G.P. Putnam's, where he was editor and publisher of "The Godfather", and is a brother-in-law of former World Chess Champion Bobby Fischer.
Split into simpler sentences: He is a son of William Targ, former editor-in-chief of G.P. Putnam's, where his father was editor and publisher of "The Godfather". Russell is a brother-in-law of former World Chess Champion Bobby Fischer.