This book covers all forms of inline skating, divided into fitness, recreational, speed, aggressive, touring, skate-to-ski, off-road, and everything in between. Each section is well written and illustrated, with parts written by an expert in that field. As it has such a broad base, it doesn't cover any one of them in any great depth. There are guides to various advanced skills, but is not by any means comprehensive. For instance there's a tutorial on Reverse Power Slides, but skating backwards, a key skill in advanced skating, is briefly mentioned as what it involves rather than how to do it.
If you already skate, or you're interested in broadening your knowledge of inline skate related sports, or researching the world of blading as a beginner, this is the book for you. If you want a feast of information on how to become a more advanced skater, you may find this a light snack.