Daniel Müller's works first came to notice in the late 1980s, when he worked for publishers Columba and Record, drawing crime and adventure strips. He then pursued the miniseries 'Harlem Nocturno' with Ray Collins, as well as 'El Cipango' with Eduardo Mazzitelli. With Robin Wood, he worked on 'El Muerto' and on episodes with 'Nippur de Lagash' (1994-96). In 2001 he was hired by the German publisher Norbert Hethke to succeed Hansrudi Wäscher as the artist of the heroic knight 'Sigurd'.