The Devil's Cinema: The Untold Story Behind Mark Twitchell's Kill Room is a true crime book by journalist and author Steve Lillebuen.

[7] The book is set in Edmonton, Alberta, Canada, and follows several detectives working on a missing persons case and the intersecting lives of Johnny Altinger and aspiring filmmaker Mark Twitchell,[8] who is under investigation for luring strangers to his "kill room,"[9] which police believe is designed to replicate elements and methods used by fictional serial killer Dexter Morgan.

[10] Twitchell's arrest and trial attracted substantial media attention since his crimes were inspired by Dexter, the television series.

ABC's 20/20,[11] Dateline NBC,[12] CBC's The Fifth Estate,[13] and many newspapers around the world covered the story, from England's The Guardian[9] to Australia's The Age.

[14] Steve Lillebuen had been an Edmonton Journal crime reporter when Twitchell was arrested, leading to a three-year project on writing and researching the book.