There doesn't appear to be an author named Jeff Astley. It's possible there's a misspelling, or that this is a pseudonym. To help me find the right author, could you please provide more context? For example:
* Is there a specific book title you're looking for?
* What genre does this author write in?
* Do you know anything about the author's nationality or time period?
With more information, I can help you find the author you're looking for.