Publishing a book is nothing like the fireworks and the parade at Disneyland. However if you set your expectations right, there will be many surprises. You will be surprised by those who buy; people you never imagined would.
It is stated in the candidate handbook of NAHQ that a quality professional or CPHQ is an individual that has the knowledge and skills to apply quality and improvement to the healthcare facilities. So, it is definitely a great credential that you may have.