I found this book to be not bad, though it was no way as good as the original. I was disappointed that the main characters like Catherine didn't appear in it. But as Northhanger abbey is my favourite Jane Austen story I am disappointed that of all the sequels written, only one has been written about it.
I found the book interesting, though lacking a serious plot, though I did find the ending fitting. All in all, I found this book not bad and I guess its up to you as to whether you buy it. I'm glad I did but only give the book a 3.