[2] In 1952, Muster started drawing his comic strip Zvitorepec, which was running in magazines Poletove podobe in povesti (PPP) and Tedenska tribuna.

His work in comics was frowned upon by the Communist Yugoslav government, with socialist realism being the preferred art style and anything too Western undesirable.

[4] After Slovenia declared independence, Muster returned home and was for some time drawing caricatures for political magazines Mag and Reporter.

Also in 2014, he was awarded the silver order of merit for his pioneering work in the field of comics and animation by the President of Slovenia Borut Pahor.

The stories combined an American funny-animal art style with the dramatic conventions of Franco-Belgian bandes dessinées, including lengthy album-length narratives.

In order to resolve the problem, the next volume depicted American astronauts as monkeys, which pleased the Russians (while not bothering the US, where the comics were not published anyway).