Everything that landscape architects, architects, planners, civic officials, and citizen activists need to know about the critical urban role of public parks. Everything that anybody (whether they are citizen activists, or public officials, or professional landscape architects, architects, and planners) needs to know about the critical role public parks play in creating livable communities. Millions of dollars are being spent on restoring parks and creating new ones. Planner Alexander Garvin explains the rationales for their existence, the forms they take, their value, ways to pay for and govern them, and the ingredients that make successful parks, providing the first single definitive source of wisdom about them.