Author newsbreakerspublisher page 644

I think you're referring to a specific book or publication!

On page 644 of the book "Author, Newsbreakers, Publisher" (which I assume is a book about the publishing industry), I'm guessing you're looking for some information or a specific quote.

Can you please provide more context or clarify what you're looking for on page 644? Is it a particular author, newsbreak, or publisher you're interested in?