John Grümph
John Grümph, also called Le Grümph or LG, is the pen name of Nicolas Davoust, a French author, illustrator and publisher of tabletop role-playing games and comics. The author of many games, he releases part of them through his Patreon. The Dungeons and Kittens Core Rulebook lists his game Dragon de Poche among its inspirations.
He co-wrote the text of the Core Rulebook with Clément de Ruyter, Trickytophe and François Cedelle, and laid it out with Clément de Ruyter. Most of the later releases reuse this layout. He also proofread the Screen Booklet.
He publishes the Gazettes de l'Arbrachat, a series of free sandbox supplements in French, on his website legrumph.org, either publicly or through his Patreon.