The Shards by Bret Easton Ellis

Middle-aged Bret Ellis revisits his senior year at Buckley in 1981 Los Angeles amid the Trawler serial killer, who mutilates teenage girls and assembles corpses with animal parts.

This book contains: absent parents, alcohol, alternate sexual ideologies, animal cruelty, anxiety, body horror, bullying, controversial cultural/social commentary, death/grief, deception, depression, drugs, dubious consent, explicit sexual activities/nudity, gore, murder (serial), misogyny, molestation, occult-adjacent horror imagery, patently offensive content, pervasively vulgar content, predatory behaviors,  prurient content, porn, rape, sadistic behaviors, smoking, stalking, suicide ideation, toxic relationships. Torture, violence and voyeurism.