Superconductivity -- To the Reader -- Preface to the Revised Edition -- Contents -- 1 The Discovery of Superconductivity -- The Beginning -- Metals -- Resistance -- Residual Resistivity -- Critical Temperature -- Low Temperatures -- The Meissner Effect -- Magnetic Field -- Currents and Fields in Superconductors -- Ideal Diamagnetism -- Some Facts from History -- 2 Physics of Superconductivity -- How to verify that the Resistance of a Superconductor is actually Zero? -- Phase Transition -- Specific Heat -- Two Types of Electrons -- How a Superconducting Transition proceeds in a Magnetic Field -- Critical Current -- Penetration Depth of a Magnetic Field in Superconductor -- The Influence of the Superconductor Shape on Magnetic Field Penetration and Superconducting Transition -- The Intermediate State -- Type II Superconductors -- Vortices -- Vortex Motion -- Capture of Magnetic Flux -- Influence of a Crystal Lattice -- Phonons -- 3 The Nature of Superconductivity -- Quantum Mechanics -- Quantum Billiards -- The Energy Scale -- Collective Phenomena -- Superfluidity -- The Atom and Quantum States -- Quantum Liquids -- Electron-Phonon Interaction -- Formation of Electron Pairs -- Boundary of a Superconductor -- Two Basic Properties of Superconductors -- 4 Applications of Superconductivity -- Applications of Superconductivity: Tempting but Difficult -- Magnets -- Superconducting Wires -- Applications of Superconducting Magnets -- Josephson Effects -- An Application of Weak Superconductivity - SQUIDs -- 5 The Superconducting Boom -- Disturbers of Tranquility -- Avalanche -- What Feeds the Superconducting Boom? -- "The Level of Noise" -- Prospects for Superconductivity -- References.