Verticality, architectural and social, is at the heart of Colson Whitehead's first novel that takes place in an unnamed high-rise city that combines twenty-first-century engineering feats with nineteenth-century pork-barrel politics. Elevators are the technological expression of the vertical ideal, and Lila Mae Watson, the city's first black female elevator inspector, is its embattled token of upward mobility.When Number Eleven of the newly completed Fanny Briggs Memorial Building goes into deadly free-fall just hours after Lila Mae has signed off on it, using the controversial 'Intuitionist' method of ascertaining elevator safety, both Intuitionists and Empiricists recognize the set-up, but