As the first comprehensive introduction into the rapidly evolving field of spintronics, this textbook covers ferromagnetism in nano-electrodes, spin injection, spin manipulation, and the practical use of these effects in next-generation electronics. Based on foundations in quantum mechanics and solid state physics this textbook guides the reader to the forefront of research and development in the field, based on repeated lectures given by the author. From the content:Low-dimensional semiconductor structuresMagnetism in solidsDiluted magnetic semiconductorsMagnetic electrodesSpin injectionSpin transistorSpin interferenceSpin Hall effectQuantum spin Hall effectTopological insulatorsQuantum computation with electron spins