The tortures are carried out in Police Dungeons or fictional or historical settings and he sometimes draws on stock comic book heroes for inspiration - Tarzan, Conan, Superman etc. The protagonists are sometimes surrounded by onlookers enjoying the prisoners agony or perhaps simply amused by the ingenuity of the torturers who employ a vast repertoire of devices on different parts of the body - often simultaneously.
Since the victim is naked and frequently secured in an immovable position, there is often more interest in the torture implements which are depicted in great detail and in the bystanders who are clothed and tend to have more characterful faces. Likewise the settings are carefully detailed. It's as though Klaus is more interested in the prisoner's predicament than his person.
The technique is unsophisticated but enthusiastic, the pictures are coloured with pencils or crayons which create a distinctive fuzzy texture and a child-like appearance quite at variance with the subject matter. The depiction of facial outlines and anatomy is cartoon-ish at times but features and musculature are shaded with great care and the artist can deal with perspective when he wants to as in Dungeon 6. The high level of detailing adds a great deal of interest to the drawings and though there is inevitably some repetition in the subject matter Klaus is always sexy and creates some memorable compositions.
Sorry no link info but a search of the GMBA archives (link in sidebar) will turn up more examples. I'd welcome link information from readers
Readers are welcome to contribute their own comments - even if they differ from mine!
For earlier examples in this series click on the A-Z label below