I'm sorry, but without additional context, I'm unable to provide information about an author named Jack Whitney, as this is not a well-known figure within widely recognized literature circles as of my last update in 2023. It is possible that Jack Whitney might be an emerging author, an author of niche publications, or perhaps a pseudonym. The name could also be associated with multiple individuals across various fields. If Jack Whitney is an author of a particular book, article, or blog that you're interested in, providing more specific information could help in giving a more accurate description of their work. Alternatively, you could be referring to Jack Whitten, an artist known for his work as a painter. If this is the case, please provide more information, or update the name so I can assist you accordingly.