If you loved 'Innocent Victims' for its dark, psychological depth and morally complex characters, you might dive into 'The Wasp Factory' by Iain Banks. It's a twisted coming-of-age story with a protagonist who's unsettlingly detached from conventional morality, much like the narrative tone in 'Innocent Victims'. The book’s unreliable narrator and macabre rituals create a similar sense of unease.
Another recommendation would be 'We Need to Talk About Kevin' by Lionel Shriver. It explores the aftermath of a school shooting through the lens of a mother’s guilt and denial, mirroring the themes of innocence and culpability. The prose is brutally honest, and the emotional weight lingers long after the last page. For something more surreal, 'Geek Love' by Katherine Dunn delves into family dysfunction and societal outliers with a grotesque yet poignant touch.