This book (and its individual Foundation and Advanced components) are being pushed hard by the ISEB as essential reading for their Programme/Project Support qualifications. They are also being pushed hard by the publishers to support Mr Marsh's roadshows.
As a Programme Office Manager/Consultant with 5 years experience working in UK bluechips, I was looking forward to additional useful reading to assist my work.
What I find is heavy-going, very basic and with gaps. Given the cost of the books, I am annoyed to have wasted both time and money for little return. I could write a better book on Project and Programme Office - if I had the time.
I would suggest readers try looking at Project Managment Office (PMO) from a project management viewpoint - the PMO is there to enable project managers to do their job.
So look at books on best practice project management - like Geoff Reiss (Project Management Demystified). Look at the reviews and go for books which deal with practical techniques/application. That's my suggestion for what it's worth.