Darkly Dreaming Dexter by Jeff Lindsay

This is the first book in the series; Dexter Morgan is a Miami police blood spatter analyst and a secret vigilante serial killer who targets other criminals.

This book contains, alcohol, animal cruelty, body horror, controversial cultural, gender, racial and social commentary, death,
deception, derogatory terms, deviant content, dubious consent, drugging, fetishes, gore, mental illness, murder, misogyny, molestation, pedophilia, potentially patently offensive content, profanity, racism, rape/sexual assault, sadomasochism, sex
trafficking/prostitution, sexism, sexual content, sexual harassment, smoking, torture.
violence and voyeurism.