The genius of The Gone-Away World sneaks up on you in a loud and bombastic way. Nick Harkaway's writing reminds me two Douglases who are masters of the absurd and apocalyptic: Douglas Coupland and Douglas Adams. Sardonic and observant, Harkaway tosses off scene after scene of unrelenting zany fun. Yet when the smoke clears and the score is tallied, The Gone-Away World is ultimately, like jPod or The Hitchhiker’s Guide to the Galaxy, about…