Ronan Lefebvre is a cartoonist and comics scriptwriter from Lille, who is better known as Sti. Originally a computer engineer, he gave up his dayjob and turned to cartooning. He published his first works on his blog, and soon got his work published on a regular base in magazines like Le Journal de Mickey, Spirou and Lanfeust Mag. Most of his work is published in book format by Paquet from Switzerland, such as his humor series 'Tony Rabbit' (2008-2012) and 'La Ferme!' (2011-2014).
He is however also a productive writer for other artists. With Flemish artist Luc Cromheecke, he made 'L'Île Carrément Perdue', a mix between Pirates of the Caribbean and Monty Python, for Spirou. Further creations as a scriptwriter are 'Michel chien fidèle' with Mic (Paquet, since 2009), 'Dipoula l'Albinos' with Pahé (Paquet, 2008-2012) and 'Ze Jacky Touch' with Pau (Paquet, 2013-2014).