I Could not be happier with this book.
I'm a beginner at light room and decided to buy the book when I realized I wasn't even using 1/10th of light room's power.
This book goes through step by step the light room workflow from shoot to print.
Martin writes wonderfully and as a result the book reads quite quickly. I constantly found myself putting the book down and trying what Martin suggested. Let me tell you after buying this book almost all my pictures looked better. The most useful part though, was the printing chapter. Martin explained in detail the printing process from start to finish. My prints are way better now then they ever have been before.