I've read Philip Pullman's His Dark Materials trilogy and his Sally Lockhart quartet, and loved both series, and I'd been considering buying this for some time. I only got round to it a few days ago, and I'm so glad I did - it's an absolutely fantastic story, brilliantly constructed and written. Don't be put off by its appearance as a "kid's book" - I'm in my 20s and was blown away by it. It has the feel of a Brothers Grimm fairy tale. There are quirky characters, magical and scary creations, and a wonderful atmosphere. What's so impressive about it is the way the story is constructed - just like, as the title suggest, clockwork. It's told in two separate parts, which both lead up to a third part when the two stories come together - but the second part is very much a part of the first part, seen from a different point of view. There are also insightful and amusing little asides on almost every page, little snippets of information, like the little cogs that all add up to make a clock work. You get little pieces of the puzzle, and finally everything comes together and makes sense at the end - it is a fantastic story. Overall, a wonderful book by Philip Pullman, who has the amazing ability to write stories that appeal to both adults and children. I can't wait to read more of his fairy tales.