Vladik Khononov, a renowned expert in software design and author, returns to share insights from his book on coupling. He deftly explains how coupling impacts software complexity and modularity, emphasizing that it's neither inherently good nor bad. Key discussions include the shared lifecycle concept, essential vs. accidental complexity, and the three dimensions of coupling: integration strength, distance, and volatility. Vladik challenges traditional views on modularity, stressing the significance of knowledge boundaries for creating maintainable systems.