Steven Lejeune is a French graphic novelist.
He has worked with other French comic book writers, like Jean-David Morvan. He is most well-known for his work on the comic book series TDB, or Trop de Bonheur (which loosely translates to "Too Much Happiness"). The series, which takes place in a future France, was first started in 2002 and is published by Delcourt.
You can find his blog here: stevenlejeuneonline.blogspot.com/.