This comprehensive introduction to the policies, theory and practice of planning outlines land use, urban planning and environmental protection policies and explains the nature of the planning process.
Read an early edition of this book. Great points on how planning interacts with local and national politics. Even though I am not a planner, it helped me understand some key issues from their perspective.
Interesting take on problem solving. First time I can remember a textbook saying - If you think you are ever going to solve these problems, you will always be frustrated. The most you can do is steer things in a better direction.