Wit and wisdom … and engineering. Engineers create models of natural processes in order to build the world we live in. Resonance, natural frequency, design, controls-no one understands the physical world like an engineer. But can engineering tell us anything about human nature? In this short and witty book, author J L Duncan explores the analogues between human behaviour and physical processes. Do individuals have a natural frequency? Can we be predicted and modified? And if Tesla thought he could make a building fall down by pushing it at just at the right intervals, can subtly timed irritations make a human being go to pieces? The quest is speculative, entertaining, and not at all meant to instruct-though it may accidentally do so, just a little.