One of the most popular books of the year has been Michelle McNamara’s engrossing true-crime work I’ll Be Gone in the Dark: One Woman’s Obsessive Search for the Golden State Killer. Vulture reported this week that due to its wild popularity, HBO has decided to snatch up the television rights to the book.

The network is planning to produce a documentary series based off of McNamara’s work. I’ll Be Gone in the Dark recounts the author’s obsessive journey into hunting down the “Golden State Killer”, a serial rapist and murderer.

I’ll Be Gone in the Dark spans decades as it covers the Golden State Killer’s crimes during the 1970s and 1980s as well as the author’s detailed work into the case.

McNamara passed away in 2016, and her book was published after her death. Comedian Patton Oswalt, who was married to McNamara, has championed her book and will executive produce the HBO series.

Oswalt offered a statement on the upcoming project. “HBO taking on this story will advance the passionate pursuit that Michelle shared with dozens of men and women in law enforcement — to solve the mystery of one of California’s most notorious serial killers,” Oswalt said.

While true-crime fans are waiting for HBO’s adaptation of McNamara’s work, her book I’ll Be Gone in the Dark is being sold on shelves now.