In the end, the zombie apocalypse was nothing more than a waste disposal problem. Burn them in giant ovens? Bad optics. Bury them in landfill sites? The first attempt created acres of twitching, roiling mud. The acceptable answer is to jettison the millions of immortal automatons into orbit.
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Used availability for Tony Burgess's The N-Body Problem
October 2013 : Canada Paperback
October 2013 : USA, Canada, UK Kindle edition