The information at harpercollins.co.uk doesn't include a US release date.
The current listing on US Amazon appears to be an imported edition from the UK.
Hardcover: 544 pages
Publisher: HarperCollins UK; Library edition (October 27, 2011)
The "US" Edition does not exist - it IS an imported title from the UK, distributed through Trafalgar...the question in progress is, when the 'export' from the UK will go on sale in the USA...
I had inquired when, through the distributor, and got the January target - if that is in error (the listings were not fed, yet, to Amazon and elsewhere), who knows if their date was in error, or if the listing at Amazon is not accurate? It's a complex chain, and there are many points along the way for the data to get mixed up. I apologize for the frustration. Once I get the artwork turned in (very soon, now) I will try again to get to the bottom of it.
Just preorder it from the Book Depository. You'll get it near the 27th and there's free shipping world wide.
Just throwing it out there: Since the last US publisher dropped the series due to, I'm assuming at least in part, a lck of sales, wouldn't it be much better for those in the US to order it through the US booksellers?
If all the US fans order from the UK upon launch, there'd be little activity when launched in the US and this could only reflect poorly in the new publishers mind?