Largo Winch is a Belgian comic book series by Philippe Francq and Jean Van Hamme, published by Dupuis. It started as a series of novels by Van Hamme in the late 1970s, but stopped due to a lack of success and the huge amount of work Van Hamme had in the meantime with his comic books (e.g. Thorgal). When artist Philippe Francq wanted to start a series with Van Hamme, he revived his old hero, and reworked the novels into the first albums of the comic book series. Later, more stories followed.
Source : Wikipedia