Is The Devil is a Part-Timer Based on a Manga or Light Novel, and is it Finished?

The Devil is a Part-Timer began as a series of light novels. From there came a shonen manga, written once again by Satoshi Wagahara. The manga is ongoing but the light novel series is complete.

The Devil is a Part-Timer! Volume 18 Light Novel Review - TheOASG

The Devil is a Part-Timer!! 2nd Season Receives New Trailer and Visual, Premiere Date

The Devil Is a Part-Timer!! Novel Series Gets New Volume on September 8 - News - Anime News Network

Complete Set The Devil Is a Part-Timer! Vol.1-8 - Japan Manga Hataraku Maou-sama

The Devil is a Part-Timer! Newest TV Anime Orders Up OP and ED Theme Song Performers - Crunchyroll News

The Devil is a Part-Timer!! Gets the Gang Together for Updated Visual

The Devil is a Part-Timer! Volume 19 Light Novel Review - TheOASG

The Devil is a Part-Timer! Volume 18 Manga Review - TheOASG

Review – The Devil is a Part-Timer! Complete Series

Kono Light Novel ga Sugoi! - Wikipedia

The Devil Is a Part-Timer! (TV Series 2013–2023) - IMDb

The Devil is a Part-Timer!! 2nd Season (Sequel) Key Visual : r/anime

The Devil is a Part-Timer Season 3: Everything we know so far