Original sentence: Bateman also documents his relationship with his estranged family, including his senile mother, whom he visits in a nursing home, and his younger brother, a hedonistic college dropout (Sean Bateman, one of the protagonists from Ellis's earlier novel The Rules Of Attraction; Patrick Bateman himself also briefly appeared in said novel)
Edited sentence: Bateman also documents his relationship with his estranged family, including his senile mother, whom he visits in a nursing home, and his younger brother, a hedonistic college dropout (Sean Bateman, one of the protagonists from Ellis's earlier novel The Rules Of Attraction; Patrick Bateman himself also briefly appears in said novel)