BREAKING NEWS UPDATE: There is a major shakeup in the works atop publishing imprint Simon & Schuster. I’m hearing that Simon & Schuster CEO Carolyn Reidy is removing S&S publisher David Rosenthal. And sources tell me that replacing him will be Jonathan Karp, the former publisher of the Twelve imprint at Grand Central Publishing owned by Hachette. Calls to Reidy and S&S publicity were not returned. Karp also didn’t return an email.