I normally love Frommer's guides, but this one did not meet my expectations. To its credit, the book is visually appealing, with many nice photos. And, it does convey quite a bit of information, including information about places to go horseback riding, which is something I always look for. I did not know much about Kauai before reading this guidebook and, because of this book, I've added Kauai to my "Must See" list.
However, while I think I will love Kauai, I definitely did not love this guidebook. The book is not organized by geographic area, but rather by general topic, such as "best of Kauai," "suggested itineraries," "where to stay," "fun in the surf & sun," and so on. This results in a huge amount of repetition. For example, Anini Beach/Anini Beach County Park is mentioned in 6 different places in the book and much of the same information is repeated in multiple sections. For example, the entry in chapter 4 is identical to that in chapter 3 and the entry in chapter 1 is incorporated, word for word, into the entry in chapter 6.
I was also frustrated because the author and I clearly have different ideas about what should be in a guidebook. The book does not provide a good general overview of the island in the beginning to help orient potential visitors, but it does include many pages of what I consider unnecessary information. For example, generic lists of the flora and fauna of the Hawaiian Islands with no pictures and no mention of when and where, on Kauai, one should look for them, are not, in my opinion, particularly useful.
When I do start planning my trip to Kauai, I will not feel comfortable relying solely on this guidebook. If you are planning a trip to Kauai and have not yet purchased a guidebook, I suggest you consider one of the other Kauai guides rather than this one.