To help me find the correct information, could you please provide more details? For example:
* What kind of books does he write? (fiction, non-fiction, poetry, etc.)
* What is his area of expertise? (history, science, psychology, etc.)
* Do you have any titles or specific works in mind?
* Is there any particular time period you're interested in?
Once I have more information, I can give you a more accurate response.