Several light novels based on the JoJo series have been written, each by a different author, but all including illustrations by Hirohiko Araki. The first, based on Part 3, was simply titled JoJo’s Bizarre Adventure, released on November 4, 1993, and written by Mayori Sekijima and Hiroshi Yamaguchi. Le Bizzarre Avventure di GioGio II: Golden Heart/Golden Ring written by Gichi Ōtsuka and Miya Shōtarō, was released on May 28, 2001, and based on Part 5. Both of these novels received Italian translations and releases; the first in 2003, often with the added subtitle of The Genesis of Universe, and the second in 2004.
In 2000, it was announced that Otsuichi would be writing a novel based on Part 4. The novel proved difficult to complete; in Kono Mystery ga Sugoi! 2004, Otsuichi claimed to have written over 2000 pages, but thrown them all out. Intent on writing a novel that lived up to the manga, it took him until 2007 to complete The Book: JoJo’s Bizarre Adventure 4th Another Day.
In April 2011, it was announced that Nisio Isin, Kouhei Kadono, and Ōtarō Maijō were each writing novel adaptations of JoJo’s Bizarre Adventure in celebration of the series’ 25th anniversary. Kadono’s, titled Purple Haze Feedback, was released on September 16, 2011, and is based on Part 5. Isin’s was released on December 16, 2011, based on Part 3 and titled JoJo’s Bizarre Adventure Over Heaven. Maijō’s novel, Jorge Joestar, was revealed in July and released on September 19, 2012. It tells the story of George Joestar II, son of Jonathan and father of Joseph, in his childhood growing up on La Palma where he is known as “Jorge Joestar” as well as an alternate version living in Japan named “Joji Joestar” investigating mysteries behind the appearance of a moving island. It features characters from and inspired by nearly every part of JoJo’s Bizarre Adventure.