"I'll Be Gone in the Dark" is a true crime book written by Michelle McNamara that explores the hunt for the Golden State Killer, a serial rapist and murderer who terrorized California in the 1970s and 1980s. The book combines McNamara's investigative research, personal reflections, and a detailed account of the crimes, highlighting the impact on victims and their families. The book was published posthumously in 2018, after McNamara's untimely death. It gained significant attention and acclaim, contributing to renewed interest in the case. In 2018, the Golden State Killer was finally apprehended, largely due to advances in forensic technology and the efforts of amateur sleuths inspired by McNamara's work.