I read this book as part of a course on Forensic Computing. In initially I agreed with the other reviewer who said that it was out of date and basic in places. However as I progressed with the course, it became obvious that this book starts off with telling you what you NEED to know, it isn't that it is out of date, it is a historical reference to the way that things are now. All the modern computer systems are derived from things that were created 30 years ago now, and mostly are hacks and kludges to make them work with the newer hardware as it is created. A fundamental understanding of these details will set you in good stead for the later chapters which detail more ...
I would strongly disagree that this wouldn't be something that I would want to rely on in court, I like being able to explain why things are done the way they are rather than just regurgitating "Because that's what EnCase says ..."
There is a new edition of this book out soon, I would reccomend that anyone who is interested waits a few months if they can - there are all the basics there, but with more elaboration on the more modern issues.
The best book for a beginner, and I've read them all ... Get Brian Carriers File System Analysis _after_ this ...