In 2015, in an interview with Den of Geek, screenwriter Zak Penn, who wrote the film adaptation of Ready Player One, reported that Ernest Cline was working on a sequel to the original novel. In December 2017, Cline confirmed that he was working on a sequel. Cline stated that the novel would have a different story-line involving all of the characters, while still exploring pop culture references like the first book. Cline announced further developments following the film adaptation of the first novel and cited its critical and financial success, as well as the studio's interest in adapting a sequel, as additional motivation to finish what he had started. Cline later stated that Steven Spielberg contributed to the writing process of the book. Ready Player Two was published and released on November 24, 2020. The Hollywood Reporter announced that Wil Wheaton would do the audio recording for the book, as he had for Ready Player One. A "treasure hunt" promoting the book was held on the video game platform Roblox.