What has the author Hein Heinsen written?

There doesn't appear to be an author named "Hein Heinsen" in any major literary databases or online records.

It's possible:

* The name is misspelled. Perhaps there is a similar name with a different spelling.

* The author is lesser-known. The author could be a local, self-published, or non-fiction author.

* The author uses a pseudonym. Some authors choose to write under a different name.

Could you please double-check the name or provide any additional information? This will help me search for the correct author.