The subject primarily refers to a cross-media franchise including a novel by Lottie Moggach and a subsequent Netflix/Channel 4 television series. A recent hockey romance novel by Riley Paige also shares this title. 1. Television Series (2018)

: The primary antagonist and creator of Red Pill who views human lives as disposable variables in his "game".

: Leila, a socially awkward woman, is hired by Tess to take over her online life so Tess can commit suicide without anyone noticing she's gone.

The original source material is a psychological thriller that focuses more on the dark ethics of identity theft.

: An introverted orphan and skilled coder who fights to expose Adrian's cult-like influence.

: Reviewers from The Hollywood Reporter praised the strong lead performances and "eerie beauty" of the CGI, though many criticized the finale for leaving major questions unanswered. 2. Novel (2013) – Lottie Moggach

: A wild, extroverted party girl with mental health struggles who forms a complex, sexually charged bond with Leila.

: The book explores the blurred lines of the "online self" and the moral weight of facilitating someone's disappearance. 3. Recent Literary Release (2026) – Riley Paige