The official sequel to the cult classic film DONNIE DARKO - the question fans have asked for over twenty years, finally answered.

On October 4, 1988, a derelict jet engine falls from the sky over Los Cerritos, California, and crashes through the bedroom of sixteen-year-old Donnie Darko, killing him instantly. For his family, the tragedy should end there. It doesn't.

Assembled entirely from recovered government transcripts, secretly recorded conversations, and early email correspondence, The Philosophy of Time Travel reconstructs the eighteen months that follow through the eyes of Donnie's mother, Rose Darko, as she and her husband Eddie, a senior CIA analyst, are drawn into a widening investigation that reaches from the Oval Office to the Mojave Desert. FBI surveillance teams, FAA officials, USC professors, and a mysterious circle of trackers and financiers all converge on the same impossible discovery: a strange "celestial fluid," a set of unexplained artifacts, and a forbidden book, Roberta Sparrow's own Philosophy of Time Travel, that appears to predict the exact circumstances of its own recovery.

Set against a real backdrop of the late Reagan era, the novel expands the mythology of the original film; Tangent Universes, Living Receivers, the Manipulated, into a sustained conspiracy that questions whether Donnie's death was ever an accident at all, and whether "gone" is the same as "gone for good."

Written by Richard Kelly, creator of the film DONNIE DARKO, this is the authorized continuation of the story for longtime fans and new readers alike.