Instruct: Classify a review as either positive or negative.
Query: One of the weaker books in a really excellent series

My wife and I have been rereading the whole series while we await the February launch of the next book - which tells you how much we like the series - and I thought I'd comment that this book seems to me to be weaker than some of the others. It's really impressive, reading through the whole chain, how the thunderous action of Book 1 is equalled by Books 2 and 3. I'd still recommend reading all of them - but if you find this book a little less captivating, skip on to book 5, or even 6 - which is one of the best in the series.