This book is very good in a theoretical sense. I would say that 50-60% of the book could be used in the real world but only in very particular situations. Still, it does a good job of laying out the foundation for Project Management and the work done to accomplish the job. It's also useful in that it defines Project Management terminology (something Microsoft has trouble with).In terms of the PMP Certification, this book is a MUST. I recommend that you read the book cover to cover...twice. Most of it is straightforward but there are a number of nuances that have to be searched out. There are a number of other PMP prep books and CDs which are also very useful. Still, this book should be considered your learning foundation.If you want more in-depth Project Management reading material then go with Kerzner. If you need the essentials, the definitions and a PMP study-guide, this is the way to go.Todd Shyres, PMP, CISSP