Complex sentence: The Unauthorized Biography of The Big G "" ECW Press, 1998 (which was not true until early 1959), but heard nothing of their investment or the percentage of profits to which they were entitled.
Split into simpler sentences: The Unauthorized Biography of The Big G "" ECW Press, 1998 which did not happen until early 1959. He heard nothing more on their investment or a percentage of profits to which they were entitled.