The emphasis of this book is on Manager's. It gives an overview for line and executive management what CP/DR is about. I personally doubt that any senior manager will read a book like this, but it is worth a try.

The book is a factually correct overview of the area, but is definetely not for any security professional worth his/her name.

A caveat is in order as well: the author tries to sell his methodology for CP/DR, which he is very certain to tell you is copyrighted as a method. Personally I don't like hard sells while trying to educate myself…