If you enjoyed the feeling of questioning what’s real as Bob Arctor’s perspective unravels, you’ll be captivated by Oedipa Maas’s journey through secret postal conspiracies and shifting realities. The Crying of Lot 49 keeps you guessing about what’s true, mirroring the disorienting, unreliable storytelling style that made A Scanner Darkly so compelling.

If the bleak, somber tone and the unflinching look at compromised lives in A Scanner Darkly stuck with you, you’ll be moved by Never Let Me Go. Ishiguro’s novel shares that haunting, gritty atmosphere as Kathy, Ruth, and Tommy grapple with their roles in a society that quietly destroys them, echoing the tragic fates and emotional rawness of PKD’s characters.

If you were fascinated by Bob Arctor’s descent into drug-fueled paranoia and his wavering sense of right and wrong, Fight Club will grip you with its narrator’s spiral into chaos, violence, and moral uncertainty. Both books feature protagonists whose actions and ethics are deeply questionable, drawing you into their inner conflict and blurred lines between hero and anti-hero.

If the philosophical undertones of A Scanner Darkly—the slippery nature of identity, reality, and consciousness—caught your attention, Ubik will take you even deeper. Joe Chip’s struggle to determine what’s real in a world where time and existence unravel mirrors the existential uncertainty that made A Scanner Darkly so thought-provoking.

If you appreciated how A Scanner Darkly explored drug culture, identity, and social collapse over technical details, you’ll love how Slaughterhouse-Five uses time travel and science fiction as a backdrop for Billy Pilgrim’s deeply human journey. Vonnegut’s novel is more about how people cope with trauma and absurdity than about the mechanics of its sci-fi elements, echoing the character-driven, speculative style you enjoyed.