Mars is usually treated as an archaeological problem, a planet whose story ended billions of years ago. This book argues the opposite. Drawing on rover data, laboratory work, and orbital observations, The Electrochemistry of Mars shows that the surface is still chemically active. Dust-driven electrical processes generate oxidants that continue to alter the planet today, reshaping how we should think about biosignature preservation, site selection, and resource use. This is not a general overview. It is a focused argument: that modern chemistry matters, that it can be measured, and that it has direct consequences for both science and engineering on Mars.