Far too many errors! Although the vast majority of this book is correct, there are also dozens of actual errors, as well as many instances of unnatural language, ie phrases a native would never use, nor consider to be right, although they might be correct according to some dictionaries. That just isn't good enough for a book this size. If they had bothered to get it proof read by a native Norwegian, this could have been easily avoided. I bought this book for my non-norwegian girlfriend, and had to spend a couple of hours correcting it before handing it over. I am a Norwegian who writes for a living. See amazon.com for a more comprehensive review.