Coming from Gollancz in September as part of the SF Masterworks series:
You can pre-order in the UK here.
Slow River will be published in the series, too. I'm just not sure when. Both are available here as ebooks for readers in non-US territories. US readers, of course, have always been able to get them, either from Amazon or their friendly local bookseller (here in Seattle I suggest University Book Store or Seattle Mystery Bookshop).