This book took me five years to write – a personal record – and would not exist without the support and encouragement of a host of friends, and several friendly editors. Among the many people who read and commented on the early drafts are: Andrew J. Wilson, Stef Pearson, Gav Inglis, Andrew Ferguson, Jack Deighton, Jane McKie, Hannu Rajaniemi, Martin Page, Stephen Christian, Simon Bisson, Paul Fraser, Dave Clements, Ken MacLeod, Damien Broderick, Damon Sicore, Cory Doctorow, Emmet O'Brien, Andrew Ducker, Warren Ellis, and Peter Hollo. (If your name isn't on this list, blame my memory – my neural prostheses are offline
