Let's start with the cover of the book. "Basic and advanced techniques" it says. Really? Crossing one skate over the other and jumping in place are about as advanced as this book gets.
For the complete beginner, this can be a handy book. If you've never set foot on skates, or can't figure out how to stop, this book can help. If you'd like to read a brief history of in-line skating, this book can help. If you're interested in skating purely for physical fitness, this book can help.
If, on the other hand, you're interested in learning more than how to stop, go, turn and skate backwards (though I find this instructions for skating backwards to be lacking) then keep looking, you won't find any "advanced" information here.
All in all, this book touches lightly on a variety of beginner's topics, but fails to keep its promises, especially to those looking to get more in-depth.