checked with my dad. here's what he came up with...

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The google translation was very close. Here is what I got:

An old woodcarver named Friedolin finds an alive Kasper puppet in a cupboard. (Must have been Giupetto! Did Pinoccio come from these tales?)
The puppet gets bored living with the old man and decides to see the world. He arrives in a small town where he meets and makes many friends. While helping one of his friends reconnect with his one true love, he comes in contact with the moody/witty Duke August Erasmus of Mt. Heavenhigh. He travels to Switzerland and Kasperland where he meets many people just like him. He leaves there and returns. ( It is not clear where he returns to.) In the last volume of the series "Kasperle Games and Pranks", the author has included a number of scripted puppet plays that can be performed.

The author Josephine Siebe seems to be avery famous and prolific author of childrens books. There are many of her childrens books available in german, dutch and other translations. I don't know which language you correspondent read them in but I am certain she will find what she is looking for.
I ran a Google search on her name and came up with lots of sites selling her stuff. Especially german ones.

Here is one site,
Shortcut to: dogbert.abebooks.com/servlet...hResults

Another site:
Shortcut to: www.zvab.com/offers/siebe-josephine.html

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hope this helps!