This work describes all basic experimental facts about high temperature superconductors with a critical temperature Tc = 30 K and above, and explains them microscopically starting with a Hamiltonian and a step-by-step statistical mechanical calculation. All important theoretical formulas are derived without omitting steps and all basic questions are answered in a user-friendly manner. The book, aimed at second-year graduate students, is written in a self-contained manner. Hence, non-physics majors and professional scientists should find it useful as a self-study reference.
