What has the author H de Lens written?

There is no author known as "H de Lens". It's possible that you have a misspelling or the author uses a different name.

Could you please double-check the spelling or provide any other information about the author you are looking for? This could include:

* Genre of their writing

* Approximate time period they wrote

* Any other books or works by them

With more information, I can hopefully help you find the author you are looking for.