|Hataraku Maou-sama! Light Novel Volume 0|
|Release Date||September 10, 2014|
|Number of Pages||344|
|Cover Character/s||Sadao Maou, Shirō Ashiya, Hanzō Urushihara|
|Next Novel||Light Novel Volume 0-II|
Hataraku Maou-sama! Light Novel Volume 0 (はたらく魔王さま！0) is the 1rst special edition book of Hataraku Maou-sama! Light Novel series.
It tells the past of Satan Jacob, Alsiel, and Lucifer when they were still in the Demon World. There is also a short story on an incident where Emilia had to take on a giant lizard and another which takes place in Japan, just a year before the incidents in Vol 1.