Intellectual Property Infringement Damages : A Litigation Support Handbook, by Russell L. Parr, is a helpful tool for economic, accounting and law professionals. As a lawyer and certified public accountant testifying as an expert witness in an area of valuation and valuation of intellectual property and infringement damages, I found the book very helpful. After reading this book I was able to improve my presentation and testimony in the courtroom. Moreover, the book was helpful to me to better quantify my calculations on the witness stand. I find the book an essential tool for the professionals working in area of litigation support and damages.