* The name is misspelled. Perhaps there's a similar name that you're thinking of.
* The author is not well-known. There are many authors who publish works in niche genres or have smaller followings.
* You might be thinking of a different person. David Ventham could be a name associated with something other than writing, like a musician, artist, or actor.
Could you please provide more context? For example:
* Do you know anything else about the author, such as their genre or a specific book title?
* Is there a website or publication where you saw this name?
With more information, I may be able to help you find out more about this author.