Cities are often viewed as the least-healthy environments for humans because they are centers of pollution, overcrowdedness, and waste. But the opposite can be true. A well-planned city can be a model of sustainable living. Good city building counters the sprawl of suburbia with concentrated land use, replaces globalized design with regionally appropriate building types, and allows for livable, desirable neighborhoods. John Lund Kriken and Philip Enquist, both longtime partners in the preeminent and award-winning planning firm Skidmore, Owings & Merrill(SOM) have collaborated with writer Richard Rapaport to create City Building.