It’s a very, very mad world: A book sequel to the 2001 cult classic film “Donnie Darko” will be releasing later this year from filmmaker Richard Kelly and Range Literary Publishing.

Titled, “The Philosophy of Time Travel,” the approximately 800-page book will take place in 1988, in the immediate aftermath of the original film, which famously ended with the death of Jake Gyllenhaal’s titular Donnie Darko, a Southern California teen who spends the better part of the movie in a dreamlike state while anticipating the end of the world.

Written by Kelly over the past 10 years, “The Philosophy of Time Travel” will debut in Q4 (in line with the 25th anniversary of “Donnie Darko” on Oct. 26) and is now available for preorder at Barnes and Noble and Amazon. An specific sale date will be announced in the coming months.

Produced by Flower Films, “Donnie Darko” debuted at Sundance in 2001 and was distributed theatrically by Newmarket Films later that year. Along with Gyllenhaal, Jena Malone, Drew Barrymore, Maggie Gyllenhaal, Mary McDonnell, Holmes Osborne, Katharine Ross, Patrick Swayze, Noah Wyle, and Seth Rogen.

According to Kelly, the book sequel is the first step in a larger plan to make multiple “Donnie Darko” film sequels. The filmmaker’s goal is to have this novel adapted into an animated/motion-capture movie and then continue to the story with a live-action project that jumps 28 years into the future.