The Geek Manifesto was published on May 10, 2012, by Bantam Press.
It’s available on Amazon.co.uk here.
It’s also available as an eBook — the Amazon Kindle edition is here, and it’s on the iBookstore too.
Links to other retailers can be found through my publisher’s site.
A sample chapter, The Geek Manifesto: Why Science Matters to Government, is available to download as an eBook for 50p.