Who wrote the book called Staying Nine?

There is no book titled "Staying Nine." It is possible that you are misremembering the title or author. Can you provide any more information, such as:

* What is the genre of the book? (e.g., fiction, non-fiction, mystery, romance)

* Who are the main characters?

* What is the basic plot of the book?

With more details, I can help you find the correct book title and author.