The series premiered in 1967.

The series consists of long detective stories that are somewhat reminiscent to the stories of Tintin; they are adventurous, humorous, graphically naivistic, the good and the bad guys are easily identified, and the main character - who is a teenager - solves the problems he encounters.
Lööf occasionally added a few celebrities to his series; examples are Lee Marvin and - Tintin...

Felix must not be confused with Felix the Cat.