The Art And Craft Of Problem Solving -

Paul Zeitz's "The Art and Craft of Problem Solving" is a foundational text designed to help students transition from routine exercises to complex,, non-routine mathematical problems. It emphasizes a "no-holds-barred" approach, focusing on mental stamina and strategies such as symmetry and the pigeonhole principle. The 3rd edition is available through retailers like Wiley and Amazon . The Art and Craft of Problem Solving by Paul Zeitz