What has the author Carl Palmgren written?

There doesn't seem to be a well-known author named "Carl Palmgren". It's possible you're thinking of someone else, or perhaps the name is misspelled.

To help me find the author you're looking for, could you please provide more information? For example:

* Are you sure about the spelling? Perhaps it's Carl Palmgreen or something similar.

* What kind of books do you think they wrote? Genre, subject matter, etc.

* Do you have any other information about them? Nationality, time period they lived in, etc.

With more details, I can help you find the right author.