I assume you wrote this review in the hope that prospective purchasers of the guide would be better informed. I have to give your review one star, because you do not say exactly what was inaccurate in the book - is it the location details of the campsites or the facilities on offer or other aspects? A good review would also offer some advice on alternative camping guides. Just a vague negative comment is pretty useless.
You talk about "the campsite owner". Does this mean you only visited ONE campsite? What about the remaining 149?