Mankind on the Run — Gordon R. Dickson

One day Kil Bruner was a solid Class A engineer in a society of World Police and citizen Files, jet-set migrants and status-ranking Stability keys. But the Police ordered Kil to forget about his missing wife Ellen - and that was a mistake. Because Kil would move Heaven and Earth to find the woman he loved. Even when the search leads to slums filled with blade-wielding thugs and criminal Ace Kings . . . to secret societies and vast, interlocked, warring conspiracies - each out to rule the Earth or destroy it. Even when the search costs Kil his freedom, his sanity, the core of his soul - and reality itself . . . Because to find Ellen, Kil will have to move Heaven and Earth. Literally.