[.uk] Telecom Audit : A Complete Cost-Reduction Strategy for ... (ISBN 0071410546)

Good overview:
While this book does not cover every possible situation, it does provide insight into those which are most relevant. It was well written and proceeds in a logical fashion. I found chapter 10, covering taxes and fees, particularly helpful. If you are new to the commercial aspects of the telecom world, this is a good place to start. I have read several books on the subject and found this one to be the most complete.

Great Place To Start:
This book is very good for a starting point and covers many areas of Telecommunications along with look into complete cost savings of your Telecommunications. You can get some great information from this book. Most companies find it is too hard to even attempt to decifer their Telecom bills let alone perform and audit to try and find cost savings. Read this book; if that doesn't work for you call a local Telecom professional to help you. You can find brokers these days to do all this for no charge to you.