John Allman is a prolific author, and it's difficult to list everything he's written without more context. Could you please provide more information about the John Allman you're interested in? For example:
* Is he a fiction or non-fiction author?
* What topics or genres does he write about?
* Do you know any specific titles or works by him?
Knowing more will help me provide you with a more accurate and helpful list of his works.