* The name is misspelled: Double check the spelling of the author's name.
* The author is less known: It's possible that Alfred Maderno is a lesser-known author, and their works are not widely available.
* The author uses a pen name: The author may use a different name when publishing their work.
To help me find more information, could you provide more context?
* What kind of books are you looking for? (Fiction, non-fiction, genre)
* Do you have any other information about the author? (Birthplace, time period, etc.)
* Where did you encounter this name? (Book title, website, etc.)
With more information, I can try to locate the author and their work.