When a mysterious cult leader known only as "Friend" begins to take over the world, Kenji Endo realizes the apocalyptic events unfolding are identical to a story he and his childhood friends wrote in their "Book of Prophecy" decades ago. Now, a group of ordinary adults must reunite to stop the destruction they once imagined as children. This psychological thriller is a masterpiece of suspense, blending mystery, nostalgia, and a complex narrative that spans decades to uncover the identity of the man threatening humanity.

Alternative Names: 20th Century Boys, Nijuuseiki Shounen, 20세기 소년, 20世紀少年.

Genre: Mystery, Sci-Fi, Psychological, Seinen.

Author: Naoki Urasawa.

Status: Completed.