* The name is misspelled or slightly different. A quick search for variations of the name might reveal more information.
* The author is not widely known. There are many talented writers who don't achieve widespread fame.
* The author is primarily known for non-literary works. Perhaps they are a musician, artist, or scientist whose writing is not their main focus.
To help you find more information, could you please provide any additional details you have about Carl Georg Valdemar Bratli?
For example:
* What kind of books do you think they might have written? (e.g., fiction, non-fiction, poetry)
* Do you have any approximate time period for their writings? (e.g., 19th century, 20th century)
* Do you have any specific works in mind? (e.g., titles, themes)
With more information, I can help you find the author and their works.