Has anybody bought this PS book by Kieron Dowling?

Hi,

I would like to buy this book to learn project system.

SAP® Project System Handbook McGraw Hill

by Kieron Dowling (Author)

However i would like to know if this book uses a real life business example to teach the PS configuration step by step instead of just explaining the theories behind it without using an example. Hence if someone has already bought this book please answer by above question.