I think this book a good one for learning Norwegian.  I started with this book and CDs and I found them to be very useful for learning the language.  The language itself is fairly easy, but this book takes the next step and makes the learning of it entertaining.

They use a story method to teach the language, which is what I would recommend for anyone who is learning or making a materials to learn a language.  For languages like Norwegian with relatively little morphology it is especially helpful.

I think this book is good, but there are some parts which are hard.  Overall its' a good book.