<P>The book deals with the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-temperature and MgB2 superconductors. The loss originates
from the ohmic dissipation of normal electrons in the normal core driven by the electric field induced by the flux motion.</P> <P>Readers will learn why the resultant loss is of hysteresis type in spite of such mechanism.</P>