VERTIGO. London: Victor Gollancz Ltd, 1978. Octavo, printed blue-gray wrappers. Advance copy (uncorrected proof) of the first edition. In the twenty-first century, antigravity harnesses give everyone the power of personal flight. But in such a world how is traffic to be controlled safely, and how do policemen deal with juvenile delinquents who have the whole sky in which to play their dangerous games? A fine example of logical extrapolation conveyed in an ingenious plot with interesting characters." - Pringle, The Ultimate Guide to Science Fiction, second edition (1995), p. 401. A fine copy. (#106321).