Wanted to take the time to write a review for the ERM Performance book. I have read a few books by different authors and they all include a little information or tip that the next one does not. None of them really cover setting up the scanner though. The ERM Performance book does cover the scanner use and set up very well. Had I read this book when starting out I would have saved a ton of time trying to set up the scanner properly using filters for street tuning and not been chasing my tail on trying to dial in my tune. The book also covers every other aspect needed to get started tuning and then some. For anyone starting out I highly recommend starting with this book. For me even just the scanner section is worth its weight in gold.