PositiveThe New YorkerThe familiar part of the Welles saga, his rapid rise to the pinnacle of Kane, has been told many times, most stylishly in Simon Callow’s 1995 book, Orson Welles: The Road to Xanadu—the first of three biographical volumes to date, with a fourth to follow. But Patrick McGilligan’s Young Orson: The Years of Luck and Genius on the Path to Citizen Kane, the product of years of meticulous research, may be the definitive account.