Complex sentence: He is unmarried, but has had close relationships with a number of women throughout the series of ten novels, but with few close friends and the seeming ability to make enemies from amongst some of his colleagues who, nevertheless, grudgingly respect him.
Split into simpler sentences: He is unmarried, but has had close relationships with a number of women throughout the series of ten novels. Otherwise, he has few close friends--and the seeming ability to make enemies from amongst some of his colleagues who, nevertheless, grudgingly respect him.