Complex sentence: Some of Hadleigh's books are quotes collections, some are histories and overviews, and some are interview books with noted personalities in movies; several portions of these interviews, as with Rock Hudson, were published in periodicals before the subjects died.
Split into simpler sentences: Some of Hadleigh's books are quotes collections, some are histories and overviews, and some are interview books with movie personalities. Several of these interviews, as with Rock Hudson, were published in periodicals before the subjects died.