This is a compact book (just 256 pages), for people who may need to get a general but complete idea of the matter.
And, as the matter is not that common, it's important to find in a single book so many arguments put together.
The step by step concept of the book allows beginners to start "thinking" as a forensic photographer.
The accompanying CD, with images and exercises, provides a basic and easy to understand introduction to the use of photographic elements used in legal / forensic investigations.
As a professional, I find this book too short and lacking in some details. Also, I think it's time for an updated / revised edition.