The original Devilman was an adaptation and remake of Nagai's previous work Demon Lord Dante, and was first published in 1972. At the same time as the manga's publishing the company Toei was airing an anime series set entirely in its own universe for up to 39 episodes. Various novels, spin-off series and two OVA's were made, the Dante manga being remade twice, but it wasn't until Nagai really brought back his series with the manga Devilman Lady which ran for three years spanning 17 volumes in 1997 to 2000. The series popularity spawned new interest in the franchise and Nagai worked with Yu Kinutani to create Amon: The Darkside of the Devilman, which was accompanied by a third OVA and was later sequeled by Strange Days. At the same time as Amon's publishing, a series named Neo Devilman was published featuring story's all written and drawn by different artists. There have been many more series and crossovers in recent years, including the manga Devilman Grimoire by Takato Rui which finished only after 21 chapters in 2014 but already has a strong fanbase. the most recent manga Devilman Saga by Go Nagai himself began on December 25, 2014.