A broad introduction to high Tc superconductors, their parent
compounds and related novel materials, covering both fundamental
questions of modern solid state physics (such as correlation effects,
fluctuations, unconventional symmetry of superconducting order
parameter) and applied problems related to short coherence length, grain
boundaries and thin films. The information that can be derived from
electron spectroscopy and optical measurements is illustrated and
explained in detail. Descriptions widely employ the clear, relatively
simple, phenomenological Ginzburg-Landau model of complex phenomena,
such as vortex physics, vortex charge determination, plasmons in
superconductors, Cooper pair mass, and wetting of surfaces. The first
comprehensive reviews of several novel classes of materials are
presented, including borocarbides and chain cuprates.