Originally published in four volumes nearlyfifty years ago, Cities in Flight brings together the famed "Okie novels" of science fiction master James Blish. Named after the migrant workers of America's Dust Bowl, these novels convey Blish's "history of the future," a brilliant and bleak look at a world where cities roam the Galaxy looking for work and a sustainable way of life. In the first novel, They Shall Have Stars, man has thoroughly explored...