My issues with the originals, which feature a circa 12 year old pair of twins hurled into a Cheshire setting with supernatural goings-on, were two-fold. I was already a huge Lord of the Rings fan and I couldn't help feeling that the svarts that the children discover down the copper mines are extremely derivative of the orcs in the Moria scene in LotR. I also felt that Garner flung in every tradition he could think of in a messy mix. So we had witches, King Arthur and his knights sleeping under the hill to rescue England at its peril, a wizard, the Wild Hunt and even a chunk of Norse mythology.
So what of the 'sequel'? First the good news. Boneland is an interesting book in its own right, I love the way Garner weaves in Jodrell Bank (visible from his house), and the character Meg is superb. Colin, one of the twins from the original books, now middle-aged, is less appealing (and, I'm sorry, but Garner got his surname wrong. It just sounds wrong.) But the claims on the cover are downright fibs.
Not only is there no way this is the concluding book of a trilogy - it has no similarity of feel to the first books - Philip Pullman's comments on the rear are highly misleading. He calls it a resolution of the stories of the first two books, and says those who were young when they came out (as he and I both were) 'won't be disappointed: this was worth waiting for.' Actually I was hugely disappointed. The first books didn't need a resolution: the apparent cliff-hanger that links them and Boneland isn't in the original books. And this is anything but a resolution. Let me try to explain why have problems with this book.
One is inconsistency. Having said that the original books were a real mish-mash of legends and traditions, at least there was some consistency of having a medieval English feel (with a touch of Scandanavian) to them. Apart from the use of crows, there is hardly any overlap with the mystical content of this book, which is all cod-Stone age. And there is so much of that. I really had to fight myself not to skip over the huge chunks of mystical waffle to get back to Colin and Meg, because it is deliberately obscure and unsatisfying.
It didn't help for me, and I know not everyone will agree, that it was cod-Stone age. I have real problems with this particular style. I found the same experience with Michelle Paver's Wolf Brother books. The thing is, if you use an existing legend - like the Wild Hunt - you are tying into a true tradition, and that gives a story real resonance. But we have no idea what Stone age religion was like (or even if they had any: it's all supposition). So people make guesses from cave paintings. But it always feels really false and strained to me. But most of all, as already mentioned, what we find here has nothing to do with the mythos of the Weirdstone books.
So, all in all, a disappointment. Not a bad book, by any means. But it doesn't do what it says on the tin.
You can see more on Boneland or buy a copy (if I haven't put you off - note I did say it was an interesting book in its own right) at Amazon.co.uk and Amazon.com.